Question

The areas of two circles are in a ratio of 169:121. What is the ratio of their radii?

Answer 1

13 : 11

Explanation:

If the ratio of radii = a : b, then

ratio of areas = a² : b²

Given

ratio of areas = 169 : 121, then

ratio of radii =
`√(169)` :
`√(121)` = 13 : 11

Answer 2

`1 (48)/(121)`

Explanation:

divide 169/121 and that equals the answer above