Question

The length,breadth and height of the room 5m,4m,and 3m respectively. Find the cost of washing the wall of the room and the ceiling at the rate of Rs7.50 m2

Answer 1

length of the room = 5m
breadth of the room = 4m
height of the room = 3m
Area of four walls including the ceiling = 2(l+b)×h + (l×b)
= 2(5+4)×3 + (5×4) m2
= (54 + 20) m2
= 74 m2 Cost of white washing = ₹7.50 per m2
Total cost = ₹ (74×7.50) = ₹ 555