Question

the ratio of the radii ofor two wheels is 3:4.what is the ratio of their circumference

Answer 1

Ratio of circumference is :--

2piR1 : 2piR2.

R1:R2

3:4

So , ratio of circumference of circle
is also 3:4

Answer 2

Big wheel/small wheel=4/3
Ratio of circumferences,
Big wheel=2×22/7×4
Small=2×22/7×3
=4/3

Ratio of circumference is also 3:4