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CBSE Class 9 Answered

The length, breadth and height of a room are 5 m, 4m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m2.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert 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

Answered by | 04 Jun, 2014, 03:23: PM
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