Selected MCQ

Current Question
A rectangular field 30 m long and 20 m broad is dug uniformly. How deep should it be so that the removed earth forms a cube?
  • A. 12 cm
  • B. 10 cm
  • C. 18 cm
  • D. 24 cm
Correct Answer: B
Explanation:
Volume conservation gives depth = 10 cm.
Related Question 1
A tank 3 m long, 2 m wide, and 1.5 m deep is dug. If soil is spread over a field, what is the rise in level?
  • A. 0.299 cm
  • B. 0.29 cm
  • C. 2.98 cm
  • D. 4.15 cm
Correct Answer: C
Explanation:
Volume ÷ field area.
Related Question 2
A rectangular field has one side 4 m and a diagonal of 5 m. What is an area?
  • A. 12 sq m
  • B. 4√14 sq m
  • C. 20 sq m
  • D. 15 sq m
Correct Answer: A
Explanation:
Other side = 3 → area = 12.
Related Question 3
A rectangular field has a diagonal length. Find the side length.
  • A. 15.16 cm
  • B. 16.17 cm
  • C. 17.18 cm
  • D. 18.19 cm
Correct Answer: C
Explanation:
Use Pythagoras theorem.
Related Question 4
A swimming pool is 24 m long and 15 m broad. How many men are required to complete the work?
  • A. 32
  • B. 36
  • C. 42
  • D. 46
Correct Answer: B
Explanation:
Work is proportional to area and rate.
Related Question 5
A rectangular grass field 75 m × 55 m has a path of width 2.5 m all around. Find the area and cost.
  • A. 675, Rs. 1350
  • B. 575, Rs. 1350
  • C. 1350, Rs. 675
  • D. None
Correct Answer: A
Explanation:
Path area computed from outer minus inner rectangle.