Convert speed into $k m / h$
$7.5 m / s$

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Solution

As we know that $1 k m / h = \frac{1000}{60 \times 60} m / s = \frac{5}{18} m / s$
$⟹ 1 m / s = \frac{18}{5} k m / h$
$7.5 m / s = 7.5 \times \frac{18}{5} k m / h = 27 k m / h$

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