12.A train 100 metres long takes 6 seconds to cross a man walking at 5 kmph in the direction opposite to that of the train. Find the speed of the train.
A. 55 kmph
B. 50 kmph
C. 45 kmph
D. 40 kmph
Option : A
Let the speed of the train be x kmph.
Speed of the train relative to man = (x + 5) kmph =
|
|
(x + 5) x
|
5
|
|
m/sec
|
18
|
⇒ 30 (x + 5) = 1800
⇒ x = 55
Speed of the train is 55 kmph.
Title :
Trains Q12
Description : 12.A train 100 metres long takes 6 seconds to cross a man walking at 5 kmph in the direction opposite to that of the train. Find the spee...
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