SOLUTION: A train 100 meter long takes 3 second to cross a man walking at the rate of 6km/hr in a direction opposite to that of the train. Find the speed of the train.
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Question 1036256: A train 100 meter long takes 3 second to cross a man walking at the rate of 6km/hr in a direction opposite to that of the train. Find the speed of the train.
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A train 100 meter long takes 3 second to cross a man walking at the rate of 6km/hr in a direction opposite to that of the train.
Find the speed of the train.
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Let "u" be the speed of the train (in meters/minute !), now unknown.
Then the equation is
0.05*u + 100*0.05 = 100 (1)
(0.05 is the 0.05 minute = minute = 3 sec;
100 = 6 = = 100 ).
Simplify and solve (1):
0.05u + 5 = 100,
0.05u = 100 - 5 = 95,
u = = 1900 = 114 .
Answer. The speed of the train is 114 .
