Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively . If they cross each other in 23 seconds, what is the ratio of their speeds?
Pick
A) 3/2
B) 1/2
C) 4/3
D) 3/4
E) 1/5
Let the speed of the trains be x and y respectively   length of train1 = 27x   length of train2 = 17y   Relative speed= x+ y   Time taken to cross each other = 23 s   =&gt; (27x + 17 y)/(x+y) = 23   =&gt; (27x + 17 y)/ = 23(x+y)   =&gt; 4x = 6y   =&gt; x/y = 6/4 = 3/2   3/2nswer is 3/2.
<result>A</result>
Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively . If they cross each other in 23 seconds, what is the ratio of their speeds?