Speed of a man is 50 km/hr. If he stops for a few minutes in an hour, then its average speed becomes 45 km/hr. Find the total time of stoppage in an hour.

6 min

Normal Speed = 50Km/hr

Reduced Speed = 45 k/h

Note: Average speed reduced by 5km/hr, it means the time taken by the man to travel 5 km at normal speed is equals to the time of stoppage.

Therefore,

At normal speed

50km  in   60min

5 km   in   6 min

He stop 6 min in an hour.