Pyramid A is a square pyramid with a base side length of 9 inches and a height of 10 inches. Pyramid B has a volume of 1,350 cubic inches. How many times bigger is the volume of pyramid B than pyramid A? Give your answer as a percent. Provide an explanation and proof for your answer to receive full credit.

Question

unofficialllyy · Answer

I would use the formula 
$$V=a^2\frac{ h }{ 3 }$$ correct?

unofficialllyy · Answer

@Vocaloid

vocaloid · Answer

yes, if a is the side length of the base

unofficialllyy · Answer

I first thought I would have to use $$V=\frac{ lwh }{ 3 }$$ but that is for a rectangular pyramid, and the formula I put earlier is for a square pyramid, which is what the problem says. That's the only question I had :) Thanks!

vocaloid · Answer

both formulas should work, remember that all squares are also rectangles

unofficialllyy · Answer

True thanks. :)