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Problems on Trains
How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?
25
30
40
45
Correct Answer:
30
Explanation:
Speed of the train relative to man
= (63 - 3) km/hr
= 60 km/hr
=
❨
60 x
5
❩
m/sec
18
=
❨
50
❩
m/sec.
3
∴ Time taken to pass the man
=
❨
500 x
3
❩
sec
50
= 30 sec.
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