Question

The wheel of a car with a diameter of 50 cm makes 750 revolutions per minute. How fast is the car running in km/h?

Answer 1

first find the circumference of the wheel

Answer 2

@rizwan_uet 50pi cm or 157 cm.

Answer 3

it means one complete revolution = 157 cm

750 revolution = 750 x 157= to get total distance covered in one minute

Answer 4

@rizwan_uet 11750 cm/min?

Answer 5

ok now convert 11750 cm into kilometers

hint:

1 meter = 100 cm and 1000 meters = 1 kilometer

Answer 6

it is not 11750 its 117750

Answer 7

@rizwan_uet 1.1775 km

Answer 8

@rizwan_uet Is the answer 70.65 km/hr?

Answer 9

yap you are right

Answer 10

@rizwan_uet Thanks!

Answer 11

welcome