A man crosses a road 250 meters wide in 75 seconds. His speed in km/hr is:
A man crosses a road 250 meters wide in 75 seconds. His speed in km/hr is:
[A]12.5
[B]15
[C]10
[D]12
12
$latex Speed = \frac{Distance }{Time}=\frac{250}{75}&s=1$
$latex =\frac{10}{3}m/s=\frac{10}{3}\times \frac{18}{5}km/hr&s=1$
$latex =2\times 6 km/hr= 12 km/hr$
Hence option [D] is the right answer.