Question

A car wheels which are 80cm in diameter. How many completed revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66km/hr ?​

Answer 1

Answer:

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Answer 2

Answer:

D = 80

R=40

2πr = 2π(40)

= 80π

Speed of car = 66km/hr

660000/60

110000/min

So; 110000 × 10 = 1100000

Let 'n' be the no. of complete revolution

n × one revolution = 1100000

So , n × 80π = 1100000

n = 1100000/80π

= 1100000 × 7/ 80 × 22

= 4375

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