Passing trains
Level
pending
Two trains, each 400 meters long, pass each other completely in 10 seconds when they are moving in opposite directions. Moving in the same direction, they pass each other completely in 20 seconds.
Find the speed of the faster train.
The answer is 60.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Speed = Distance /Time If x and y are the speeds of the slower and faster trains ,then x+y = (400+400)/10 = 80 m/sec y-x =(400+400)/20 = 40 m /sec 2y = 80+40 y = 60 m/sec