Question

The circumference of two circles are in the ratio 5:7, find the ratio between their radii.

Answer 1

Heya...

Here's your answer.....

circumference of 1st = c1= 2πr1

c2 = 2πr2

c1/c2= r1/r2

so the ratio will be same as circumference 5/7 is 5 : 7

Thanks...!!!

XD

Sorry baby 'wink'

Answer 2

circumference of circle 1 ÷circumference of circle2 =5÷7

2πr1÷2πr2 = 5÷7

r1÷r2 = 5÷7

so our ratio is 5 ratio 7