Question

The ratio of the corresponding edge lengths of two similar solids is 2:5. What is the ratio of their surface areas?

Answer 1

4: 25

l1=2
l2=5

surface area= 6*l^2

so for 1st =6*2^2
2nd= 6*5^2

ratio=6*2^2  /6*5^2

ratio= 4/25
or 4:25