Important Formulas - Problems on Trains - Quantitative Aptitude
- km/hr to m/s conversion:
- m/s to km/hr conversion:
- Time taken by a train of length x metres to pass a pole or standing man or a signal post is equal to the time taken by the train to cover x metres.
- Time taken by a train of length x metres to pass a stationery object of length b metres is the time taken by the train to cover (x + b) metres.
- 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.
- Suppose two trains or two objects bodies are moving in opposite directions at u m/s and v m/s, then their relative speed is = (u + v) m/s.
- Assume two trains of length x metres and y metres are moving in opposite directions at a m/s and b m/s, ThenThe time taken by the trains to cross each other = (x+y) / (a+b) seconds
- Assume two trains of length x metres and y metres
are moving in the same direction at at a m/s and b m/s where a > b, ThenThe time taken by the faster train to cross the slower train = (x+y) / (a-b) seconds.
- If two trains (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:
- Speed = distance/time
- velocity = displacement/time
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Important Formulas - Problems on Trains - Quantitative Aptitude
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