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1st Equation of Motion

The speed of ...

Question

The speed of a car is $20 m s^{- 1}$ . Its speed, in $k m p h$ will be

A

18

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B

36

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C

54

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D

72

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Solution

The correct option is D $72$
$20 m s^{- 1} =$ $\frac{20}{1000} \div \frac{1}{3600} k m p h$ $= 72 k m p h$

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