Question

The diameter of two circles are in the ratio 16:25. find the ratio of their area

Answer 1

hope it helps you

thank you

Answer 2

Hi ,

Let r and R are radii of two circles ,

Ratio of their areas = 16 : 25

πr² : πR² = 16 : 25

r² / R² = ( 4/5 )²

r / R = 4/5-----( 1 )

Ratio of circumferences = 2πr / 2πR

= r / R

= 4/5

[ From equation ( 1 ) ]

= 4 : 5

I hope this helps you.

:)