Two trains running in opposite directions cross a man standing on the platform in 20 seconds and 15 ...........

Quantitative Aptitude (CDS) Problems on trains

Two trains running in opposite directions cross a man standing on the platform in 20 seconds and 15 seconds and they cross each other in 20 seconds. The ratio of their speed is?

2/3

5/2

5/4

None of these

छोटे Courses बड़े Results

Master Problems on trains

Prepare through Micro-courses

Try Now

Explanation:

Let trains speed is x m/s and y m/s
And their length is L1 and L2
time=distance/time
L1/x =20 ... equation 1
L2/y =15 .... equation 2
L1+L2 /x+y =18 .... equation3
20x+15y=18x +20y
2x=5y
x/y=5/2