Question

The diameter of the wheel of a car is 70 cm .how many revolutions will it make to travel 1 km?

Answer 1

Answer:

Step-by-step explanation:

Diameter of wheel of car = 70 cm

Radius of wheel of car = 35 cm = 0.35 m

Distance to be travelled = 1 km = 1000 m

distance travelled = circumference of wheel * no. of revolutions

No. of revolutions = distance travelled / circumference of wheel

                              = 1000 / 2 * pi * r

                              = 500 / 22/7 * 0.35

                              = 500 / 22 * 5/100

                               = 100 * 100/ 22

                               = 5000 / 11

No. of revolutions = 454. 55