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The diameter of a wheel is 70 cm. It com...

The diameter of a wheel is 70 cm. It completes 600 revolutions in 1 minute. The speed, in km/h, of the vehicle is: (Take `pi=22/7`)
एक पहिये का व्यास 70 सेमी है | यह 1 मिनट में 600 चक्कर लगाता है | वाहन की चाल ( किमी/घंटा में ) है:

A

78.4

B

79.2

C

77.8

D

78.2

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PINNACLE-SPEED AND DISTANCE-EXERCISE
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  14. The ratio between the speeds of two trains is 5:7. If the first train ...

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