The length, breadth and height of a room are 5 m, 4m and 3m respectively. Find the cost of white washing the wall of the room and the celling at the rate of Rs.7.50 per sq.m.
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Step-by-step explanation:
l=5m
b=4m
h=3m
Area of 4 walls= 2(l+b)h
= 2(5+4)3
=2 x 9 x 3= 54m^2
Area of celling= l x b
= 5 x 4= 20m^2
Cost of white washing= 7.50 x 64= Rs.480
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