the volume of two cubes are in the ratio 125 : 729 find the ratio of their edges what is the ratio of surface area .
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volume of cube= (edge)³
ratio=125/729
(edge1)³/(edge2)³=125/729
edge1/edge2= 3√125/3√729
=5/9=5:9
ratio of their edges=5:9
surface area of cube= 6a²
ratio of surface area= 6(5)²/6(9)²
= 25/81= 25:81
ratio of surface area = 25:81
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