find volume of a cubical box if cost of painting its outer surgace is ruppes 1440at the rate of rupee 15 per sq m
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Let x be the side of cube
then it's surface area is 6x^2
so cost to paint is 6x^2*15=1440
from above x=4
so now volume of cube is x^3=64 cubic metres
then it's surface area is 6x^2
so cost to paint is 6x^2*15=1440
from above x=4
so now volume of cube is x^3=64 cubic metres
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