Question

Find the similarity ratio of a prism with a surface area of 81m^2 to a similar prism with the surface area of 361m^2.

Answer 1

This is a simple relation.

A1/A2 = 81/361

Area is always a square unit.

Similarity ratio is always in single unit.

In a way - Let similarity ratios be S1 , S2

Then

S1^2/S2^2 = 81/361

Which gives S1/S2 = 9/19 = 9:19.