PLEASE HELP!!!!!

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

A.) 360 in2
B.) 180 in2
C.) 22.5 in2
D.) 3.6 in2

Question

PLEASE HELP!!!!!

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

A.) 360 in2
B.) 180 in2
C.) 22.5 in2
D.) 3.6 in2

welshfella · Answer

the areas are in the ratio of the squares of corresponding dimensions

so in this case

5^2  / 10^2  = 90 / A

find A

anonymous · Answer

22.5?

anonymous · Answer

But wouldn't the answer be 180?

ilovecake · Answer

yeah