Question

The diameter of a wheel of a bus is 140 cm. How many revolutions must the wheel make in order to keep a speed of 66km/hr

Answer 1

Answer should be 15000 revolutions

Answer 2

Answer:

250

Step-by-step explanation:

Circumference = No.of revolutions * Distance covered

Distance to be covered in 1 min. = (66 X1000)/60 m = 1100 m.

Circumference of the wheel = 2 x (22/7) x 0.70 m = 4.4 m.

Number of revolutions per min. =(1100/4.4) = 250.