Aptitude - Time and Distance

Speed, Time and Distance

Speed = DistanceTime

Time = DistanceSpeed

Distance = Speed x Time

km/hr to m/sec

x km/hr = x x 518 m/sec

m/sec to km/hr

x m/sec = x x 185 km/hr

Averge Speed

Suppose a man covers a certain distance at x kmph and an equal distance at y kmph.
Then, the average speed druing the whole journey = 2xy x + y kmph

Ratio of Time

If the ratio of the speeds of A and B is a : b, then the ratio of the times taken by them to cover the same distance is 1a : 1b