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 General Aptitude
 Time and Distance
 Important Formulas
Speed  
The speed of a moving body is the distance traveled by it in unit time.  


Distance = speed x time  
Conversation of kmph to meter per second:  




Relative speed:  
If two bodies move in the same direction, the relative speed of one with respect to the other is the difference of their speeds.  
If two bodies move in opposite direction, relative speed of one with respect to the other body is the sum of their speeds.  
Important formulae:  


Stoppage time per hour for a train:  
For the same distance of travel, if a train runs at an average speed V_{1}km/hr without stopping and  




Time and distance between two moving bodies:  
Let there be two persons A and B  
Speed of A = V_{1}km/hr  
Speed of B = V_{2}km/hr  
If they walk in the same direction, A and B will be (V_{1} – V_{2}) km apart in 1 hour  
Similarly, if they walk in opposite direction, A and B will be (V_{1} + V_{2}) km apart in 1 hour  