The wheels of a car are of diameter 80cm . How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66km per hour?
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First, Convert 66 kmph into m/s i.e 66*1000/3600 = 66*5/18= 55/3 m/s.
Now, Distance covered in 10 min = (55/3*10*60)m = 11,000 m.
Circumference of wheel= (22/7*80/100 )m, which is distance covered in one Revolution.
No. of complete Revolution = 11000/ (22/7*80/100 ) = 4,375.
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