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Problems On Trains

Problems On Trains. Important Facts and Formulae. 1. km/ hr to m/s conversion : a km/ hr = [a x (5/18)] m/s. 2. m/s to km/ hr conversion : a m/s = [a x (18/5)] km/hr.

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Problems On Trains

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  1. Problems On Trains Important Facts and Formulae

  2. 1. km/hrto m/s conversion: a km/hr = [a x (5/18)] m/s. 2. m/s to km/hrconversion: a m/s = [a x (18/5)] km/hr.

  3. 3. Time taken by a train of length lmetres to pass a pole or standing man or a signal post is equal to the time taken by the train to cover lmetres. 4. Time taken by a train of length lmetres to pass a stationery object of length b metresis the time taken by the train to cover (l + b) metres. 5. Suppose two trains or two objects bodies are moving in the same direction at um/s and v m/s, where u > v, then their relative speed is = (u - v) m/s. 6. Suppose two trains or two objects bodies are moving in opposite directions at um/s and v m/s, then their relative speed is = (u + v) m/s.

  4. 7. If two trains of length ametres and bmetres are moving in opposite directions atu m/s and v m/s, then: The time taken by the trains to cross each other = [(a+b)/(u+v)] sec. 8. If two trains of length ametres and bmetres are moving in the same direction atu m/s and v m/s, then: The time taken by the faster train to cross the slower train = [(a+b)/(u-v)] sec.

  5. 9. 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: (A's speed) : (B's speed) = (√b:√a) Try the questions given below.

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