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Question

The velocity of a car is 18m/s. Express this velocity in km/hr.


A

70 km/ hr

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B

64.8 km/h

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C

76 km/h

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D

65.7 km/h

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Solution

The correct option is B

64.8 km/h


We know that 1 km=1000 m and 1 hr=60×60=3600 s

1 m/s=11000 km13600 hr

1 m/s=3.6 km/hr

18 m/s=18×3.6 km/hr

=64.8 km/hr

Thus, the velocity of the car is 64.8 km/hr.


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