36.  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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37.  A train 132 m long passes a telegraph pole in 6 seconds. Find the speed of the train?


70 km/hr
72 km/hr
79.2 km/hr
80 km/hr


Answer

 Option

Speed =(132/6) m/sec = (22*18/5) km/hr = 79.2 km/hr.

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38.  A train 125m long passes a man running at 5 km /ph in the same direction in which the train is going in 10 seconds.The speed of the train is?


40 km/hr
50 km/hr
54 km/hr
55 km/hr


Answer

 Option

Speed of the train relative to man = (125/10) m/sec =(25/2) m/sec =(25/2*18/5) km/hr =45km/hr Let the speed of the train be x km/ph. Then relative speed = (x-5) km/ph x-5 =45 X= 45+5 =50 km/hr

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39.  A train 110 meters long is running with a speed of 60 km/ph.In what time will it pass a man who is running at 6km/hr in the direction opposite to that in which the train is going?


5 sec
6 sec
7 sec
10 sec


Answer

 Option

Speed of the train relative to the man = (60+6) km/hr = 66 km/hr =(66*5/18) m/sec = (55/3) m/sec Time taken to pass the man = (110*3/55)sec = 6 sec

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40.  A train 110 m long passes a man running at 6 km/ph in the direction opposite to that of train in 6 seconds,the speed of the train is?


54 km/hr
60 km/hr
66 km/hr
72 km/hr


Answer

 Option

Speed of the train relative to man =(110/6) m/sec = (110/6*18/5) km/hr = 66 km/hr Let the speed of train be x km/ph. Then relative speed = (x+6) km/ph X= 60 km/hr

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