How many minutes does Ashok take to cover a distance of 400 meters if he runs at a speed of 20 km/hr ?

\par Ashok's speed = 20 km/hr = (20\times \frac{5}{18}) \par m/sec = (\frac{50}{9})\par m/sec

\par Time taken to cover 400 meters = (400\times \frac{9}{50}) \par sec \par = 72 sec = 1\frac{1}{5}\par minutes