Reasoning Aptitude Verbal GK Quiz MORE

Aptitude Problem on Trains

Trains problem are depends on the concept of time, distance and speed.

Important Formula

  • Speed in km/hr

  • a km /hr =
    a * 5 / 18
    m/s.

  • Speed in m/s

  • a m/s =
    a * 18 / 5
    km/hr.

  • Time taken by a train of length L metres to pass a pole or a standing man or a signal post is equal to the time taken by the train to cover

  • L Metres.

  • Time taken by a train of length L metres to pass a stationary object of length b metres is the time taken by the train to cover

  • (L + b) metres.

  • Suppose two train or two bodies are moving in the same direction at u m/s and v m/s , where u > v, then their

  • relative speed = (u - v) m/s.

  • Suppose two trains or two bodies are moving in opposite directions at u m/s and v m/s , then their

  • relative speed = ( u + v) m/s.

  • If two trains of length a metres and b metres are moving in opposite directions at u m/s and v m/s, then time taken by the trains to cross each other

  • (a+b) / ( u+ v)
    sec.

  • If two train s of length a metres and b metres are moving in the same direction at u m/s and v m/s , then the time taken by the faster train to cross the slower train

  • (a+b) / ( u+ v)
    sec.

  • If two train ( or bodies) start at the same time from points A and B towards each other and after crossing they take a and b sec in reaching B and A respectively, then

  • ( A speed) : ( B speed) = ( vb : va ).

    Exercise