Question

if the ratio of the radii of two circles is 3 ratio 5 generation of their areas is

Answer 1

Let area of first circle be A1 and second circle be A2.

Area of a circle is pie(r^2).

Let the radius of 1st circle be r1 and 2nd circle be r2.

A1/A2 = (r1)^2/(r2)^2 [ pie gets cancelled]

A1/A2 = (3)^2/(4)^2

A1/A2 = 9/16.

Hence the ratio between the areas is 9:16.

Cheers!

Answer 2

Answer:

area = circumference

πr^2 = 2πr

r^2 = 2r

r =2