A train 550 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ?
Choose the correct choice: A) 5 sec B) 6 sec C) 7 sec D) 10 sec E) 30 sec
Solution   Speed of train relative to man =(60+6) km/hr= 66km/hr   =(66x5/18) m/sec =(55/3) m/sec   ∴ Time taken to pass the man = (550 x 3/55)sec = 30 sec   Answer 30 sec
<result>E</result>
A train 550 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ?