Question

the diameter of A wheel of a car is 70 cm how much distance will it cover in making 50 revolution

Answer 1

diameter = 70 cm
radius = 35 cm

so,
distance in one revolution
= circumference of tyre
= 2πr
= 2×(22/7)×35
= 2×22×5
= 220 cm

now,
distance in 50 revolutions = 220×50 = 11000 cm = 11 m

Answer 2

diameter of the wheel d = 70 cm
then the circumference is 2πd/2= (22/7)x70 = 2.2 m.
in 50 revolutions,
distance covered = 50x2.2 = 110 m