← Mensuration: trapezium, cuboid and cube lesson New set →

Class 8 Maths Worksheet: Mensuration

Maths worksheets lesson 62: Mensuration: trapezium, cuboid and cube · Set 170 · 40 sums
TalentJR

The method (Flat parts add up): Trapezium: area = ½ × (a + b) × h. Rhombus: area = ½ × d₁ × d₂. Cuboid: total surface area = 2(lb + bh + hl); four walls = 2h(l + b). Cube: total surface area = 6a²; edge = √(surface area ÷ 6). Missing height of a trapezium = 2 × area ÷ (a + b).

NameDateTime takenScore ___ / 40
  1. 1.A room is 9 m long, 9 m wide and 3 m high. What is the area of its four walls (in square m)?
  2. 2.The diagonals of a rhombus are 10 cm and 29 cm. What is its area (in square cm)?
  3. 3.A room is 10 m long, 5 m wide and 5 m high. What is the area of its four walls (in square m)?
  4. 4.A cuboid is 8 cm long, 10 cm wide and 6 cm high. What is its total surface area (in square cm)?
  5. 5.Each edge of a cube is 15 cm. What is its total surface area (in square cm)?
  6. 6.The diagonals of a rhombus are 22 cm and 11 cm. What is its area (in square cm)?
  7. 7.The total surface area of a cube is 216 square cm. How long is each edge (in cm)?
  8. 8.A trapezium has parallel sides of 18 cm and 4 cm, and the distance between them is 8 cm. What is its area (in square cm)?
  9. 9.A cuboid is 11 cm long, 10 cm wide and 8 cm high. What is its total surface area (in square cm)?
  10. 10.Each edge of a cube is 19 cm. What is its total surface area (in square cm)?
  11. 11.The total surface area of a cube is 1350 square cm. How long is each edge (in cm)?
  12. 12.A room is 5 m long, 4 m wide and 5 m high. What is the area of its four walls (in square m)?
  13. 13.A trapezium has parallel sides of 7 cm and 6 cm, and the distance between them is 10 cm. What is its area (in square cm)?
  14. 14.A room is 4 m long, 9 m wide and 4 m high. What is the area of its four walls (in square m)?
  15. 15.Each edge of a cube is 14 cm. What is its total surface area (in square cm)?
  16. 16.Each edge of a cube is 3 cm. What is its total surface area (in square cm)?
  17. 17.A trapezium has parallel sides of 11 cm and 6 cm, and the distance between them is 8 cm. What is its area (in square cm)?
  18. 18.A room is 4 m long, 7 m wide and 3 m high. What is the area of its four walls (in square m)?
  19. 19.A cuboid is 8 cm long, 4 cm wide and 9 cm high. What is its total surface area (in square cm)?
  20. 20.A trapezium has an area of 266 square cm. Its parallel sides are 25 cm and 13 cm. What is the distance between them (in cm)?
  21. 21.A trapezium has an area of 286 square cm. Its parallel sides are 28 cm and 16 cm. What is the distance between them (in cm)?
  22. 22.A trapezium has an area of 41 square cm. Its parallel sides are 23 cm and 18 cm. What is the distance between them (in cm)?
  23. 23.A trapezium has parallel sides of 8 cm and 5 cm, and the distance between them is 20 cm. What is its area (in square cm)?
  24. 24.A cuboid is 3 cm long, 4 cm wide and 7 cm high. What is its total surface area (in square cm)?
  25. 25.A trapezium has an area of 41 square cm. Its parallel sides are 22 cm and 19 cm. What is the distance between them (in cm)?
  26. 26.The total surface area of a cube is 726 square cm. How long is each edge (in cm)?
  27. 27.The total surface area of a cube is 384 square cm. How long is each edge (in cm)?
  28. 28.Each edge of a cube is 17 cm. What is its total surface area (in square cm)?
  29. 29.A room is 5 m long, 5 m wide and 5 m high. What is the area of its four walls (in square m)?
  30. 30.The total surface area of a cube is 1734 square cm. How long is each edge (in cm)?
  31. 31.A trapezium has parallel sides of 29 cm and 26 cm, and the distance between them is 8 cm. What is its area (in square cm)?
  32. 32.A cuboid is 8 cm long, 8 cm wide and 8 cm high. What is its total surface area (in square cm)?
  33. 33.A cuboid is 4 cm long, 11 cm wide and 5 cm high. What is its total surface area (in square cm)?
  34. 34.The total surface area of a cube is 150 square cm. How long is each edge (in cm)?
  35. 35.A room is 9 m long, 3 m wide and 3 m high. What is the area of its four walls (in square m)?
  36. 36.A trapezium has parallel sides of 27 cm and 14 cm, and the distance between them is 6 cm. What is its area (in square cm)?
  37. 37.A room is 7 m long, 5 m wide and 3 m high. What is the area of its four walls (in square m)?
  38. 38.A trapezium has parallel sides of 18 cm and 28 cm, and the distance between them is 16 cm. What is its area (in square cm)?
  39. 39.A room is 6 m long, 10 m wide and 3 m high. What is the area of its four walls (in square m)?
  40. 40.A cuboid is 8 cm long, 2 cm wide and 8 cm high. What is its total surface area (in square cm)?

Answer key

  1. 108
  2. 145
  3. 150
  4. 376
  5. 1350
  6. 121
  7. 6
  8. 88
  9. 556
  10. 2166
  11. 15
  12. 90
  13. 65
  14. 104
  15. 1176
  16. 54
  17. 68
  18. 66
  19. 280
  20. 14
  21. 13
  22. 2
  23. 130
  24. 122
  25. 2
  26. 11
  27. 8
  28. 1734
  29. 100
  30. 17
  31. 220
  32. 384
  33. 238
  34. 5
  35. 72
  36. 123
  37. 72
  38. 368
  39. 96
  40. 192

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets