The speed of a body is 2 m/s. The time it would take to cover a distance of 60 km is _______.

\frac{25}{3} m i n

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\frac{25}{3} h r

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\frac{5}{3} m i n

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\frac{5}{3} h r

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Solution

The correct option is B $\frac{25}{3} h r$
Given,

$S p e e d = 2 \frac{m}{s} D i s tan c e t r a v e l l e d = 60 k m = 60000 m \to S p e e d = \frac{D i s t a n c e}{T i m e} \to T i m e = \frac{D i s t a n c e}{S p e e d} T i m e = \frac{60000 m}{2 m / s} T i m e = 30000 s \to 1 h r = 60 m i n = 3600 s H e n c e 30000 s = \frac{30000}{3600} h r = \frac{25}{3} h r T i m e = \frac{25}{3} h r$

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