Question

The dimensions of a room are 9m × 8m × 6.5m. It has one door of dimensions 2 m×1.5m and two windows each of dimensions 1.5m×1m. Find the cost of white washing the walls at Rs. 6.40 per $m^2$.

• A. Rs. 2297.6
• B. Rs. 2307.6
• C. Rs. 3217.6
• D. None of these

Answer 1

The correct option is A

Rs. 2297.6

Total Surface Area = 2(lb+bh+hl) = 2(72 + 52 + 58.5) = 365$m^2$

Area that is to be white washed = 365 - (2× 1.5) - 2 × (1.5 ×1) = 360.5 $m^2$

Cost of white washing = 359 × 6.4 = Rs. 2297.6