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

Class 8 Maths Worksheet: Mensuration

Maths worksheets lesson 62: Mensuration: trapezium, cuboid and cube · Set 99 · 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 cuboid is 7 cm long, 6 cm wide and 4 cm high. What is its total surface area (in square cm)?
  2. 2.A trapezium has parallel sides of 5 cm and 20 cm, and the distance between them is 16 cm. What is its area (in square cm)?
  3. 3.The total surface area of a cube is 2400 square cm. How long is each edge (in cm)?
  4. 4.The total surface area of a cube is 54 square cm. How long is each edge (in cm)?
  5. 5.A room is 12 m long, 10 m wide and 3 m high. What is the area of its four walls (in square m)?
  6. 6.A cuboid is 11 cm long, 8 cm wide and 3 cm high. What is its total surface area (in square cm)?
  7. 7.A cuboid is 6 cm long, 3 cm wide and 9 cm high. What is its total surface area (in square cm)?
  8. 8.Each edge of a cube is 21 cm. What is its total surface area (in square cm)?
  9. 9.The diagonals of a rhombus are 30 cm and 29 cm. What is its area (in square cm)?
  10. 10.The diagonals of a rhombus are 6 cm and 13 cm. What is its area (in square cm)?
  11. 11.A trapezium has an area of 112 square cm. Its parallel sides are 14 cm and 18 cm. What is the distance between them (in cm)?
  12. 12.A cuboid is 3 cm long, 12 cm wide and 6 cm high. What is its total surface area (in square cm)?
  13. 13.Each edge of a cube is 23 cm. What is its total surface area (in square cm)?
  14. 14.The total surface area of a cube is 384 square cm. How long is each edge (in cm)?
  15. 15.A trapezium has parallel sides of 26 cm and 10 cm, and the distance between them is 2 cm. What is its area (in square cm)?
  16. 16.A cuboid is 5 cm long, 4 cm wide and 2 cm high. What is its total surface area (in square cm)?
  17. 17.A room is 6 m long, 5 m wide and 4 m high. What is the area of its four walls (in square m)?
  18. 18.The diagonals of a rhombus are 12 cm and 5 cm. What is its area (in square cm)?
  19. 19.Each edge of a cube is 17 cm. What is its total surface area (in square cm)?
  20. 20.Each edge of a cube is 3 cm. What is its total surface area (in square cm)?
  21. 21.Each edge of a cube is 6 cm. What is its total surface area (in square cm)?
  22. 22.A room is 11 m long, 3 m wide and 3 m high. What is the area of its four walls (in square m)?
  23. 23.A room is 5 m long, 4 m wide and 3 m high. What is the area of its four walls (in square m)?
  24. 24.The total surface area of a cube is 216 square cm. How long is each edge (in cm)?
  25. 25.Each edge of a cube is 11 cm. What is its total surface area (in square cm)?
  26. 26.A cuboid is 4 cm long, 2 cm wide and 2 cm high. What is its total surface area (in square cm)?
  27. 27.A room is 12 m long, 3 m wide and 3 m high. What is the area of its four walls (in square m)?
  28. 28.Each edge of a cube is 14 cm. What is its total surface area (in square cm)?
  29. 29.A trapezium has parallel sides of 5 cm and 9 cm, and the distance between them is 3 cm. What is its area (in square cm)?
  30. 30.A trapezium has parallel sides of 9 cm and 24 cm, and the distance between them is 20 cm. What is its area (in square cm)?
  31. 31.A trapezium has parallel sides of 15 cm and 11 cm, and the distance between them is 4 cm. What is its area (in square cm)?
  32. 32.The diagonals of a rhombus are 22 cm and 7 cm. What is its area (in square cm)?
  33. 33.A trapezium has parallel sides of 15 cm and 13 cm, and the distance between them is 8 cm. What is its area (in square cm)?
  34. 34.A trapezium has parallel sides of 14 cm and 20 cm, and the distance between them is 20 cm. What is its area (in square cm)?
  35. 35.The total surface area of a cube is 486 square cm. How long is each edge (in cm)?
  36. 36.A trapezium has parallel sides of 27 cm and 29 cm, and the distance between them is 20 cm. What is its area (in square cm)?
  37. 37.A trapezium has an area of 345 square cm. Its parallel sides are 28 cm and 18 cm. What is the distance between them (in cm)?
  38. 38.A trapezium has parallel sides of 5 cm and 23 cm, and the distance between them is 19 cm. What is its area (in square cm)?
  39. 39.Each edge of a cube is 10 cm. What is its total surface area (in square cm)?
  40. 40.A trapezium has parallel sides of 18 cm and 4 cm, and the distance between them is 10 cm. What is its area (in square cm)?

Answer key

  1. 188
  2. 200
  3. 20
  4. 3
  5. 132
  6. 290
  7. 198
  8. 2646
  9. 435
  10. 39
  11. 7
  12. 252
  13. 3174
  14. 8
  15. 36
  16. 76
  17. 88
  18. 30
  19. 1734
  20. 54
  21. 216
  22. 84
  23. 54
  24. 6
  25. 726
  26. 40
  27. 90
  28. 1176
  29. 21
  30. 330
  31. 52
  32. 77
  33. 112
  34. 340
  35. 9
  36. 560
  37. 15
  38. 266
  39. 600
  40. 110

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