Aptitude::Time and Distance

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Important Formulas

 

  Speed = ( Distance / Time ),
Time = ( Distance / Speed ),
Distance = ( Speed * Time )
1.   x km/hr = [ x * 5/18 ] m/sec.
2.   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.
3.   x m/sec = [ x * 18/5 ] km/hr.

4.

 

 

  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.