Question

The length, breadth and height of a room are 5 m, 4 mand3 m respectively. Find the
cost of white washing the walls of the room and the ceiling at the rate of
7.50 per m2​

Answer 1

Answer:

Area to be whitewashed does not include the floor.

Therefore, area to be whitewashed

= Area of four walls + area of the ceiling

= 2 (l + b)  h + l  b

= [2 (5 + 4)  3 + 5  4] m

=54 + 20 m2

= 74 m2

Cost of white washing = Rs 7.50  74 = Rs 555