Question

a pyrmid has a height of 5 in. and a surface area of 90 in square. find the surface area of a similar pyramid with a height of 10 in. round to the nearest tenth, if necessary

Answer 1

Check the picture below.

`\cfrac{5^2}{10^2}=\cfrac{90}{A}\implies \cfrac{25}{100}=\cfrac{90}{A}\implies \cfrac{1}{4}=\cfrac{90}{A}\implies A=360`