Question

Circumferences of two circles are in the ratio 5:4 find the ratio of their areas.

Answer 1

Answer:

Step-by-step explanation:

The ratio of the circumference of the circle = 5 : 4

 Let circumference of first ratio = 5x

∴ 2πr = 5x

r = $\frac{5x}{2\pi }$

and the circumference of second ratio = 4x

∴ 2πr = 4x

r = $\frac{4x}{2\pi }$

Ratio between their radii = $\frac{5x}{2\pi } :\frac{4x}{2\pi }$

                                           = 5 : 4