- Speed = [Distance/Time],
Time = [Distance/Speed],
Distance = (Speed*Time)
- x km/hr = [x*5/18] m/sec.
- 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
1/a : 1/b or b:a.
- x m/sec = [x*18/5] km/hr.
- Suppose a man covers a certain distance at x km/hr and
an equal distance at y km/hr. then, the average speed
during the whole journey is [2xy/x+y] km/hr.