Question

The ratio of the diameters of two circles is 3:4 find the ratio of their circumferences

Answer 1

Heya !

Question -

The ratio of the diameters of two circles is 3:4 find the ratio of their circumferences

Answer -

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

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

A1/A2 = 9/16.

Hence the ratio between the areas is 9:16.

Hope This Helps You !

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