Selected MCQ

Current Question
A room is 15 m long, 4 m wide, and 3 m high. Find the cost of whitewashing its walls at 50 paise per m².
  • A. Rs. 60
  • B. Rs. 57
  • C. Rs. 55
  • D. Rs. 52
Correct Answer: B
Explanation:
Area of four walls × rate.
Related Question 1
Total cost of flooring a room at Rs. 8.50 per m² is Rs. 510. Find the area.
  • A. 7.5 m²
  • B. 8.5 m²
  • C. 10.5 m²
  • D. 12.5 m²
Correct Answer: A
Explanation:
Area = cost/rate = 510/8.5.
Related Question 2
A room is 6.24 m long and 4.32 m wide. What is the least number of equal square tiles needed?
  • A. 110
  • B. 124
  • C. 96
  • D. 117
Correct Answer: D
Explanation:
Divide the area using the largest square tile size.
Related Question 3
A room is 4.37 m long and 3.23 m wide. What is the minimum number of square slabs required?
  • A. 485
  • B. 431
  • C. 391
  • D. 381
Correct Answer: C
Explanation:
Tile size from HCF ⇒ total tiles = 391.
Related Question 4
A room is 12.25 m long and 7 m wide. What is the largest square tile size to cover it exactly?
  • A. 200 cm
  • B. 175 cm
  • C. 125 cm
  • D. 150 cm
Correct Answer: B
Explanation:
Tile size = HCF of dimensions.
Related Question 5
The perimeter of the floor of a room is 18 m. What is the area of its four walls?
  • A. 21 m²
  • B. 42 m²
  • C. 54 m²
  • D. 108 m²
Correct Answer: C
Explanation:
Area of four walls = perimeter × height (given/implied), yielding 54 m².