the wheel of a car are of diameter 140cm each how many complete Revolution does each wheel make 10 minute when the car is travelling at speed of 66 km per hour
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Answered by
1
Car is travelling at 66km/hr.
For 10min it should have travelled 11km. i.e 11x1000x100 cm.
Therefore the complete revolution required to cross the above distance is = 11x1000x100/(3.14x140)
= 2502.27 complete revolutions
Answered by
1
here 10 minutes is equal to 1/6 hour
we know distance=speed*time
=>d=66*1/6
=>d=11km
here diameter od wheel is 140 cm.Hence radius will be 70cm
perimeter is 2πr
=>p=6.28*70
=>p=439.6cm
no.of roations = d/p
=>r=11*1000m/439.6cm
=>r=11000*100cm/439.6cm
=>r=2502.62
hence no.of complete rotations made by car is 2502
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