{
  "title": "Mensuration Word Problems - Grade 4 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "📏 Square garden side 8m. What is its area? 🏡",
      "options": { "A": "32 m²", "B": "48 m²", "C": "64 m²", "D": "72 m²" },
      "correct_answer": "C"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "🟦 Rectangular field 12m long, 5m wide. Area = ?",
      "options": { "A": "50 m²", "B": "55 m²", "C": "60 m²", "D": "65 m²" },
      "correct_answer": "C"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "📐 Square tile side 30cm. Area in cm²?",
      "options": { "A": "600", "B": "750", "C": "900", "D": "1200" },
      "correct_answer": "C"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "🔺 Triangular flag: base=6cm, height=4cm. Area = ? 🚩",
      "options": { "A": "10 cm²", "B": "12 cm²", "C": "14 cm²", "D": "16 cm²" },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "📏 Room 9m×7m. Floor area = ?",
      "options": { "A": "54 m²", "B": "56 m²", "C": "63 m²", "D": "72 m²" },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "🟦 Book cover 20cm×15cm. Area = ?",
      "options": {
        "A": "250 cm²",
        "B": "280 cm²",
        "C": "300 cm²",
        "D": "320 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "📐 Square photo frame perimeter 40cm. Area = ?",
      "options": {
        "A": "80 cm²",
        "B": "90 cm²",
        "C": "100 cm²",
        "D": "120 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "🔺 Triangular garden: base=8m, height=5m. Area = ?",
      "options": { "A": "18 m²", "B": "20 m²", "C": "22 m²", "D": "24 m²" },
      "correct_answer": "B"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "📏 Wall 4m high, 10m long. Area to paint = ?",
      "options": { "A": "35 m²", "B": "38 m²", "C": "40 m²", "D": "44 m²" },
      "correct_answer": "C"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "🟦 Carpet 3m×2m. Area = ?",
      "options": { "A": "5 m²", "B": "6 m²", "C": "7 m²", "D": "8 m²" },
      "correct_answer": "B"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "📐 Square park side 50m. Area = ?",
      "options": {
        "A": "2000 m²",
        "B": "2200 m²",
        "C": "2400 m²",
        "D": "2500 m²"
      },
      "correct_answer": "D"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "🔺 Banner triangle: base=12cm, height=9cm. Area = ?",
      "options": { "A": "48 cm²", "B": "52 cm²", "C": "54 cm²", "D": "58 cm²" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "📏 Window 1.5m×1m. Area = ?",
      "options": { "A": "1.2 m²", "B": "1.3 m²", "C": "1.4 m²", "D": "1.5 m²" },
      "correct_answer": "D"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "🟦 Notebook 25cm×20cm. Area = ?",
      "options": {
        "A": "450 cm²",
        "B": "480 cm²",
        "C": "500 cm²",
        "D": "520 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "📐 Square chessboard side 60cm. Area = ?",
      "options": {
        "A": "3200 cm²",
        "B": "3400 cm²",
        "C": "3600 cm²",
        "D": "3800 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "🔺 Road sign triangle: base=40cm, height=30cm. Area = ?",
      "options": {
        "A": "550 cm²",
        "B": "580 cm²",
        "C": "600 cm²",
        "D": "620 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "📏 Blackboard 2m×1.5m. Area = ?",
      "options": { "A": "2.8 m²", "B": "3.0 m²", "C": "3.2 m²", "D": "3.5 m²" },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "🟦 Table top 120cm×80cm. Area = ?",
      "options": {
        "A": "8600 cm²",
        "B": "9200 cm²",
        "C": "9600 cm²",
        "D": "9800 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "📐 Square tile area 625 cm². Side = ?",
      "options": { "A": "22 cm", "B": "23 cm", "C": "24 cm", "D": "25 cm" },
      "correct_answer": "D"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "🔺 Sail triangle: base=5m, height=8m. Area = ? ⛵",
      "options": { "A": "18 m²", "B": "20 m²", "C": "22 m²", "D": "24 m²" },
      "correct_answer": "B"
    },

    {
      "id": 21,
      "difficulty": "medium",
      "question": "🏡 Room 6m×5m. Carpet covers ¾ area. Carpet area = ?",
      "options": { "A": "20 m²", "B": "21.5 m²", "C": "22.5 m²", "D": "24 m²" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "📏 Square garden area 144 m². Path 2m wide inside. Inner garden area?",
      "options": { "A": "64 m²", "B": "81 m²", "C": "100 m²", "D": "121 m²" },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "🟦 Rectangular pool 25m×12m. Walkway 1m wide around it. Total area?",
      "options": { "A": "350 m²", "B": "378 m²", "C": "396 m²", "D": "414 m²" },
      "correct_answer": "D"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "🔺 Triangular park area=240 m², base=30 m. Height = ?",
      "options": { "A": "14 m", "B": "15 m", "C": "16 m", "D": "17 m" },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "📐 Square and rectangle have same area 64 m². Rectangle length=16 m. Which has larger perimeter?",
      "options": {
        "A": "Square",
        "B": "Rectangle",
        "C": "Same",
        "D": "Can't say"
      },
      "correct_answer": "B"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "🏠 Floor 8m×6m. Tiles 40cm×40cm. How many tiles? 🔳",
      "options": { "A": "250", "B": "275", "C": "300", "D": "325" },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "📏 Field 60m×40m. ¼ used for building. Remaining area?",
      "options": {
        "A": "1600 m²",
        "B": "1700 m²",
        "C": "1800 m²",
        "D": "1900 m²"
      },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "🟦 Picture frame 50cm×40cm with border 5cm wide. Picture area?",
      "options": {
        "A": "1200 cm²",
        "B": "1300 cm²",
        "C": "1400 cm²",
        "D": "1500 cm²"
      },
      "correct_answer": "A"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "🔺 Triangular cloth area=150 cm², height=15 cm. Base = ?",
      "options": { "A": "18 cm", "B": "19 cm", "C": "20 cm", "D": "21 cm" },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "📐 Square plot area=256 m². Path 2m wide around it. Total area including path?",
      "options": { "A": "324 m²", "B": "361 m²", "C": "400 m²", "D": "441 m²" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "🏡 Garden 20m×15m. ⅓ for flowers, ½ for vegetables. Rest area?",
      "options": { "A": "40 m²", "B": "45 m²", "C": "50 m²", "D": "55 m²" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "📏 Room perimeter 36 m, length 10 m. Area = ?",
      "options": { "A": "70 m²", "B": "75 m²", "C": "80 m²", "D": "85 m²" },
      "correct_answer": "C"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "🟦 Two rectangles: A=12×8, B=16×6. Which needs more fencing?",
      "options": { "A": "A", "B": "B", "C": "Same", "D": "Can't say" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "🔺 Triangular land area=96 m², height=12 m. Base = ?",
      "options": { "A": "14 m", "B": "15 m", "C": "16 m", "D": "17 m" },
      "correct_answer": "C"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "📐 Square area increased by 69% when side increased by?",
      "options": { "A": "20%", "B": "25%", "C": "30%", "D": "35%" },
      "correct_answer": "C"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "🏠 Hall 12m×10m. Chairs occupy ⅗ area. Free area?",
      "options": { "A": "42 m²", "B": "45 m²", "C": "48 m²", "D": "50 m²" },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "📏 Rectangle area=120 m², length:width=5:3. Length = ?",
      "options": { "A": "12 m", "B": "14 m", "C": "16 m", "D": "18 m" },
      "correct_answer": "B"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "🟦 Tiles 25cm×20cm. How many for 5m×4m floor?",
      "options": { "A": "350", "B": "375", "C": "400", "D": "425" },
      "correct_answer": "C"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "🔺 Triangle area=84 cm², base:height=7:4. Base = ?",
      "options": { "A": "14 cm", "B": "15 cm", "C": "16 cm", "D": "17 cm" },
      "correct_answer": "A"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "📐 Square and equilateral triangle have same perimeter 60 cm. Square area = ?",
      "options": {
        "A": "196 cm²",
        "B": "210 cm²",
        "C": "225 cm²",
        "D": "240 cm²"
      },
      "correct_answer": "C"
    },

    {
      "id": 41,
      "difficulty": "hard",
      "question": "🏡 Rectangular plot 40m×30m. House 20m×15m, garden ½ of rest. Garden area?",
      "options": { "A": "375 m²", "B": "400 m²", "C": "425 m²", "D": "450 m²" },
      "correct_answer": "D"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "📏 Square field area=1 hectare (10000 m²). Path 5m wide inside. Inner field area?",
      "options": {
        "A": "6400 m²",
        "B": "7200 m²",
        "C": "8100 m²",
        "D": "9000 m²"
      },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "🟦 Room 9m×8m×6m (L×B×H). Floor area = ? (Ignore height)",
      "options": { "A": "54 m²", "B": "63 m²", "C": "72 m²", "D": "81 m²" },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "🔺 Equilateral triangle area=36√3 cm². Square of same perimeter. Square area?",
      "options": {
        "A": "64 cm²",
        "B": "81 cm²",
        "C": "100 cm²",
        "D": "121 cm²"
      },
      "correct_answer": "A"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "📐 Rectangle length increased by 20%, width decreased to keep area same. Width decrease %?",
      "options": { "A": "16.67%", "B": "18.33%", "C": "20%", "D": "22.22%" },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "🏡 Plot 50m×40m. Path 2m wide all around inside. Area of path?",
      "options": { "A": "296 m²", "B": "312 m²", "C": "328 m²", "D": "344 m²" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "📏 Square and circle have same area 154 cm² (π=22/7). Square side?",
      "options": { "A": "11 cm", "B": "12 cm", "C": "13 cm", "D": "14 cm" },
      "correct_answer": "D"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "🟦 Two rectangles: perimeter ratio 3:4, area ratio 9:16. Length:width ratio same?",
      "options": {
        "A": "Yes",
        "B": "No",
        "C": "Can't say",
        "D": "Data insufficient"
      },
      "correct_answer": "A"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "🔺 Right triangle area=30 cm². One leg=5 cm. Inradius? (r=area/s)",
      "options": { "A": "2 cm", "B": "2.5 cm", "C": "3 cm", "D": "3.5 cm" },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "📐 Square divided into 4 equal triangles. Each triangle area=18 cm². Square area?",
      "options": { "A": "64 cm²", "B": "72 cm²", "C": "81 cm²", "D": "90 cm²" },
      "correct_answer": "B"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "🏡 House 20m×15m on plot 40m×30m. Garden around house. Garden area?",
      "options": { "A": "800 m²", "B": "850 m²", "C": "900 m²", "D": "950 m²" },
      "correct_answer": "C"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "📏 Rectangle area increased by 50% when length increased 25%. Width increase %?",
      "options": { "A": "15%", "B": "18%", "C": "20%", "D": "22%" },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "🟦 Tiling: Room 7.2m×6.4m with tiles 0.8m×0.8m. Tiles needed?",
      "options": { "A": "64", "B": "72", "C": "81", "D": "90" },
      "correct_answer": "B"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "🔺 Triangle area=½ rectangle area. Both same base=24 cm. Triangle height=18 cm. Rectangle perimeter if length:width=3:2?",
      "options": { "A": "80 cm", "B": "84 cm", "C": "88 cm", "D": "92 cm" },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "📐 Square area=circle area (π=22/7). Circle radius=14 cm. Square side?",
      "options": { "A": "22 cm", "B": "24 cm", "C": "26 cm", "D": "28 cm" },
      "correct_answer": "D"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "🏡 Compound wall around 25m×20m plot. Wall itself 0.5m thick. Total area covered?",
      "options": { "A": "525 m²", "B": "550 m²", "C": "575 m²", "D": "600 m²" },
      "correct_answer": "C"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "📏 Rectangle length decreased by 10%, width increased by 20%. Area change?",
      "options": { "A": "+6%", "B": "+7%", "C": "+8%", "D": "+9%" },
      "correct_answer": "C"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "🟦 Maximum rectangular area with perimeter 40 m?",
      "options": { "A": "90 m²", "B": "95 m²", "C": "100 m²", "D": "105 m²" },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "🔺 Right triangle inscribed in circle radius 13 cm. Maximum area?",
      "options": {
        "A": "156 cm²",
        "B": "168 cm²",
        "C": "169 cm²",
        "D": "182 cm²"
      },
      "correct_answer": "C"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "📐 Square and equilateral triangle have same area 64√3 cm². Square perimeter?",
      "options": { "A": "32 cm", "B": "36 cm", "C": "40 cm", "D": "44 cm" },
      "correct_answer": "A"
    }
  ]
}