A man crosses a road 250 metres wide in 75 seconds. His speed in km/hr is :

A. 10 km/hr

B. 12 km/hr

C. 12.5 km/hr

D. 15 km/hr

Answer: Option B

Solution(By Examveda Team)

$$\eqalign{ & S = \frac{D}{T} = \frac{{250}}{{75}}{\text{ m/sec}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{ = }}\frac{{250}}{{75}} \times \frac{{18}}{5} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 12{\text{ km/hr}} \cr} $$