The wheels of a car are of diameter 80 cm each The car is travelling at a speed of 66 km hour What i...........

Quantitative Aptitude (CDS) Time & distance

The wheels of a car are of diameter 80 cm each. The car is travelling at a speed of 66 km/hour. What is the number of complete

revolutions each wheel makes in 10 minutes?

4275

4350

4375

4450

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Explanation:

Given diameter of wheel be 80 cm.
So, radius (r) of wheel =802=40 cm
Speed of car =66×518 m/sec
=11×53=553 m/sec
Time =10 minutes
=10×60=600 sec
Distance covered by car =speedxtime
=55 / 3×600
=11000 m
=1100000 cm
Number of revolution of wheel =???????????????? ?????????????? ?????????????????????????? ???? ??h??????
=1100000 / 2 $\pi$ ??
=1100000 / 2×(22/7)×40
=4375
Hence option (3)