Time & Distance Study Materials Important Formulas ,numerical aptitude study materials,

  Time & Distance Study Materials
Important Formulas

1.Speed, Time and Distance:

• Speed = Distance/Time 
• Time =  Distance/Speed
• Distance = (Speed x Time).

2.km/hr to m/sec conversion:

• x km/hr = x .x .5/18  m/sec.

3.m/sec to km/hr conversion:

• x m/sec =  x .x.18/5  km/hr.

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

• 1/a  : 1b     Or
• b : a.

5.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.