PSC Study Materials

Train Problems – Shortcut Tricks and Formulas

Train Problems – Tricks and Formulas

Formula :
Speed = Distance / Time
So, Train Speed = Distance / Time.

Points to Remember
To change km/hr into m/sec, we need to multiply it by 5 / 18.
Example:
180 km/hr means
180 x 5 / 18
= (10 x 5 )
= 50 m/sec.
And if we need to convert m/sec into km/hr, we multiply it by 18 / 5.
Example:
50 m/sec means
50 x 18 / 5
= ( 10 x 18 )
= 180 km/hr.

  • Time taken by a train of length l meters to pass a pole or standing man or a signal post is equal to the time taken by the train to cover l meters.
  • Time taken by a train of length l meters to pass a stationary object of length b meters is the time taken by the train to cover (l + b) meters.
  • Suppose two trains or two objects bodies are moving in the same direction at u m/s and v m/s, where u > v, then their relative speed is = (u – v) m/s.
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