The height of a room is 4m. The room has a size of 3m ×2m. Find the cost of painting the inner sides of 4 walls at the rate of RS 2.50 per square metre.
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Height-4m
Length-3m
Breadth-2m
CSA-2(l+b)×h
= 2(3+2)×4
=2(5)×4
=40m^2
Cost of painting per metre square=rupees 2.50
Cost of painting 40m^2 = 2.50×40=rupees 100 Answer
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