Question

If the dimensions of a solid proportionally increase by a scale factor of 5/2, by what factor does the surface area increase?

A. 5/2

B. 5/4

C. 25/2

D. 25/4

Answer 1

D

Explanation:

Answer 2

D

Explanation:

Given that the dimensions of a solid are in proportion a : b, then

then the ratio of the area is a² : b²

Thus

scale factor =
`(5)/(2)` , then

area factor =
`(5^2)/(2^2)` =
`(25)/(4)` → D