1.  A train 100 m long is running at the speed of 30 km/hr.Find the time taken by it to pass a man standing near the railway line?


12 sec
14 sec
13 sec
10 sec


Answer

 Option

Speed of the train = ( 30*5/18) m/sec = (25/3) m/sec Distance moved in passing standing man = 100m Required time taken = 100/(25/3) = (100*3/25) sec = 12 seconds

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2.  A train is moving at a speed of 132 km/hr.If the length of the train is 110 meters,how long will it take to cross a railway platform 165 meters long?


7 sec
7 1/2 sec
6 1/2 sec
6 sec


Answer

 Option

Speed of train = (132 *5/18) m/sec = (110/3)m/sec Distance covered in passing the platform= (110+165) =275 m Therefore time taken = (275*3/110) sec = 15/2 sec= 7 1/2 sec

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3.  A man is standing on a railway bridge which is 180 m long.He finds that a train crosses the bridge in 20 sec but himself in 8 sec.Find the length of the train and its speed?


54 km/hr
52 km/hr
58 km/hr
60km/hr


Answer

 Option

Let the length of the train be X meters. Then the train covers X meters in 8 sec and (X+180) meters in 20 seconds. Therefore X/8 = X+180/20 = 20x = 8 (X+180) = X =120 Therefore length of the train = 120m Speed of the train = (120/8) m/sec = m/sec=(15*18/5)km/hr = 54 km/hr

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4.  A train 150m long is running with a speed of 68 km/hr.In what time will it pass a man who is running at 8 km/hr in the same direction in which the train is going?


5 sec
8 sec
6 sec
9 sec


Answer

 Option

Speed of the train relative to man = ( 68-8)km/ph = (60*5/18)m/sec = (50/3) m/sec Time taken by the train to cross the man Time taken by it to cover 150 m at (50/3) m/sec = (150*3/50) sec = 9 seconds

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5.  A train 220 m long is running with a speed of 59kmph.In what time will it pass a man who is running at 7 km/ph in the direction opposite to that in which the train is going?


16 sec
14 sec
12 sec
15 sec


Answer

 Option

Speed of the train relative to man = (59+7) km/ph = (66*5/18)m/sec = (55/3) m/sec Time taken by the train to cross the man Time taken by it to cover 220 m at (55/3)m/sec = (220*3/55) sec =12 sec.

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