Question

The diameter of the driving wheel of a bus is 140 cm. How many revolutions per minute must the wheel make in order to keep a speed of 66 km/h ?​

Answer 1

Answer:

Distance to be covered in 1 min:

(66 × 1000) m / 60

1100 m

Radius of wheel:

(140/2) cm

70 cm

0.70 m

Circumference of wheel:

2πr

(2 × 22/7 × 0.70) m

4.4 m

Number of revolutions per minute:

(1100/4.4)

250

Step-by-step explanation:

Answer 2

Answer:

Thus, the wheel will make 250 revolutions per minute with the speed of 66km per hour

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