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?	Answers
A) Insufficient data B) 3 : 1 C) 1 : 3 D) 3 : 2 E) 2 : 3
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   ANSWER:3 : 2
<result>D</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?