IBPS /SBI PO BANKING STUDY MATERIAL ON QUANTITATIVE APTITUDE TRAINS
TRAINS SHORTCUTS FOR QUANTITATIVE APTITUDE 1. When a train passes a stationary point, the distance covered (in the passing) is the length of the train. Eg 1: What is the time taken by a train of length 360m to cross a pole at a speed of 72 kmph ? Ans: Time taken by the train to cross the pole = Length of the train / Speed of the train Speed of the train is given in kmph, whereas the length of the train is given in mts. So the speed of the train is to be expressed in m/sec. Speed of the train ( in mts/sec) = 72 x (5/18) = 20 mts/sec Time taken by the train to cross the pole = 360/20 = 18 seconds. 2. If the train is crossing a platform or a bridge, the distance covered by the train is equal to the length of the train plus the length of the platform or a bridge. Eg 2: How long will a train 200 m long travelling at a speed of 54 kmph take to cross a platform of length 100 m? Ans: Distance covered by the train = Length of the train + Length of the plat...