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20 m s^(-1) km h^(-1)...

` 20 m s^(-1) ______ km h^(-1)`

A

12.5

B

72

C

50/9

D

32

Text Solution

Verified by Experts

The correct Answer is:
B
`1kmh=5/18ms^(-1)`
`1ms^(-1)=18/5kmh`
`20ms^(-1)=20(18)/5kmh` = 72 km h
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