If the speed of a body is $5 m s^{- 1}$ , then the time it would take to cover a distance of 6 km is:

1/3 hour

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2/3 hour

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1 hour

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1/5 hour

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Solution

The correct option is A
1/3 hour

Given that speed = $5 m s^{- 1} = 5 \times \frac{3600}{1000} = 18 k m h^{- 1}$

Therefore, the time taken $= \frac{d i s t a n c e}{s p e e d} = \frac{6}{18} h r = \frac{1}{3} h r$ .

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