a pyramid has the height of 5 in. and the Surface area of 90 in2. find the surface area of a similar pyramid with a height of 10in. round if necessary.

Question

anonymous · Answer

seems like a ratio to me. well 5:90. you doubled the height so the SA doubles to 180.

anonymous · Answer

Thanks, but I tried that and the answer was wrong.  The correct answer was 360 in2,  I just want to know how they got this ...

anonymous · Answer

hmm from what i got it seemed like 180. guess not if i get it i'll let you know

anonymous · Answer

Thank you so much....