the perimeter of a floor of a rectangular hall is 60m and its height is 3m . find the cost of painting it's four walls at the rate of 20rupees/permsq. give answer with solution
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perimeter of rectangular floor 2 l+b =60.
l+b=30
h=3m
csa of cuboid = 2 l+b *h
answer is 2*30*3=180 m2
the cost is 20*180= 3600
l+b=30
h=3m
csa of cuboid = 2 l+b *h
answer is 2*30*3=180 m2
the cost is 20*180= 3600
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