Question

The area of circle b is 36 times greater than the area of circle

a. the radius of circle b is 30. what is the radius of circle a?

Answer 1

Let, area of circle a = a and of b = b

A.T.Q,

36a = b

36a = 30

a = 30/36 = 5/6

πr² = 5/6

r² = 5/6π

r = √5/√6π

You can calculate that further by putting the value of π

Answer 2

The radius of circle a is 5