Question

find the distance covered by the wheel of a car in 500 revolution if the diameter of the wheel is 77 cm

Answer 1

distance=circumference *no.of revolutionds
diameter=77cm
circumference=pi*d --->(2*r*pi)
=22/7*77=22*11=242cm
distance=242*500
=121000cm=1210 m=1.21km

Answer 2

hello!

radius=diameter/2=38.5

circumference=2×pi×radius
=(2×22/7×38.5)cm
=(2×22×5.5)cm
=(44×5.5)cm
=242cm

distance covered=(242×500)cm
=121000cm

The distance covered is 121000cm or 1.21km

hope it helps... :)