Question
A man crosses a road 250 metres wide in 75 seconds. His speed in km/hr is :
Answer: Option B
Answer: (b)Using Rule 1,Speed = $\text"Distance"/\text"Time" = 250/75$= $10/3$ m/sec = $10/3 × 18/5$ km/hr[Since, 1 m/s = $18/5$ km/hr]= 2 × 6 km/hr. = 12 km/hr.
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Answer: (b)Using Rule 1,Speed = $\text"Distance"/\text"Time" = 250/75$= $10/3$ m/sec = $10/3 × 18/5$ km/hr[Since, 1 m/s = $18/5$ km/hr]= 2 × 6 km/hr. = 12 km/hr.
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