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 25 seconds, what is the ratio of their speeds? Choose the most appropriate option:
A) 1:3
B) 4:1
C) 2:3
D) 3:2
E) 3:4
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 = 25 s   = (27x + 17 y)/(x+y) = 25   = (27x + 17 y)/ = 25(x+y)   = 2x = 8y   =x/y = 8/2= 
<gadget id="calculator">8/2</gadget>
<output>4</output>
4/1 i.e 4:1   Answer :4:1
<result>B</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 25 seconds, what is the ratio of their speeds?