one side of a cubic box is 0.4 metre how much will it cost to paint the outer surface of the box at the rate of 50 rupees per square metre
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Step-by-step explanation:
side of cubic box = 0.4m
total surface area of cubic box = 6a^2
=> 6a^2 = 6*(0.4)^2
=> 6*(0.16)
total surface area = 0.96 sq metre
cost of painting 1 sq m = Rs.50
cost of painting 0.96sq.metre= Rs.50*0.96
= Rs.48
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