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

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

goformit100 · Answer

@Noemi95 Madam

goformit100 · Answer

I solved the question thrice I got answer D 

is it correct or I have to try it again ?

anonymous · Answer

By the formula time=distance/speed.
but, we have two trains with two different distances and speeds.
then we use the formula,
total time = [(Distance1)+(Distance2)]/[speed1+speed2]
for finding distance= speed*time.[so,distance1= 27*x....like wise.
finally we get, 27x+17y/(27+17)= 23 (given totaltime.)
at last the answer is... x:y (3:2)

goformit100 · Answer

Ya thanks you explain every thing so nicely

anonymous · Answer

Are you actually understanding, or you're only looking for the answers?

goformit100 · Answer

I am actually understanding....

anonymous · Answer

Alright that's the whole point. I am glad you are.