Question

A pyramid has a height of 5 in and a surface area of 90 in2. Find the surface area for the similar pyramid with the height of 10 in. Round to nearest tenth of necessary @iGreen

Answer 1

Set up a proportion again.

\(\dfrac{5}{90} = \dfrac{10}{x}\)

Cross multiply.

5 * x = 90 * 10

Answer 2

@samsteronbroadway

Answer 3

90 * 10 = 900

Answer 4

@iGreen

Answer 5

Yes, and 5 * x = 5x.

So we have:

5x = 900

Divide 5 to both sides, what's 900 / 5?

Answer 6

180

Answer 7

Yes, that's our answer.

Answer 8

Thank you!