Q. A man crosses a road 250 meters wide in 75 seconds. His speed in km/hr is:
Answer: 12
Notes: $latex Speed = \frac{Distance }{Time}=\frac{250}{75}&s=1$ $latex =\frac{10}{3}m/s=\frac{10}{3}\times \frac{18}{5}km/hr&s=1$ $latex =2\times 6 km/hr= 12 km/hr$ Hence option [D] is the right answer.

1