The ratio of the volumes of two cubes is 729 : 125. What is the ratio of their total surface areas?  Choose the correct option
A) 81 : 21  B) 81 : 22  C) 81 : 24  D) 81 : 25  E) 81 : 29
Ratio of the sides = 3√729 : 3√125= 9 : 5   Ratio of surface areas = 9^2 : 5^2 = 81 : 25   Answer: Option 81 : 25
<result>D</result>
The ratio of the volumes of two cubes is 729 : 125. What is the ratio of their total surface areas?