Question

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

Answer 1

3 : 4 . because when comparing the ratio u would get 2πr1/2πr2 so 2πwil get cancelled thus as r1/r2 is 3:4 then ratio of circumference is also 3:4

Answer 2

radius of 1st wheel=3x
circumference=2×22/7×3=132/7
if 2nd wheel=4x
Circumference=2×22/7×4=176/7
ratio of their circumference
132/7÷176/7