With what speed should a bus travel so that it can cover a distance of 10 km in 5 min?

60 km/hr

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10 km/hr

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12 km/hr

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120 km/hr

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Solution

The correct option is D 120 km/hr
$60$ $m i n$ = $1 h o u r$
$5$ $m i n$ = $\frac{1}{60} \times 5 = \frac{1}{12} h$

$S p e e d$ = $\frac{D i s t a n c e}{T i m e}$
$D i s t a n c e = 10 k m$
$t i m e = \frac{1}{12} h$

$s p e e d$ = $\frac{10}{\frac{1}{12}}$ = $10 \times 12$
= $120$ $k m / h$

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