A train 150 m long is running at a speed of 68 kmph. How long does it take to pass a man who is running at 8 kmph in the same direction as the train?
A. 5 sec
B. 9 sec
C. 12 sec
D. 15 sec
Answers
Answered by
12
Answer : B.
Speed of the train relative to man = (68 - 8) kmph
= (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 = 9sec
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Answered by
0
Given
speed of train = 68kmph
length of train = 150m
speed of man = 8kmph
speed of train relative to boy = (68 kmph - 8kmph )= 60kmph= 60 *5/18m/s
time = distance/relative speed = 150*18/60*5= 9second
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