Question

Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:
A. 1 : 3
B. 3 : 2
C. 3 : 4
D. None of these

Answer 1

option b

Let the speeds of the two trains be x m/sec and y m/sec respectively.

Then, length of the first train = 27x metres,

and length of the second train = 17y metres.

27x + 17y= 23x+ y

 27x + 17y = 23x + 23y

 4x = 6y

x/y=3/2
=3:2

Answer 2

B part 3:2 is the right answer.

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