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Question

A person travels a distance of $72 k m$ in $4$ hours. Calculate speed in $m / s$ .

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Solution

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Distance, $S = 72 k m$
Time, $t = 4 h r$
Speed $= \frac{72}{4} k m / h r = \frac{72}{4} \times \frac{5}{18} = 5 m / s$

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