Question

Wind is blowing west to east along two parallel tracks. Two trains moving with the same speed in opposite directions on these tracks have the stream tracks. If one stream track is double than the other, what the speed of each train?

Answer 1

Let v and w be the velocity of each train and wind respectively.

As per question

(v + w) = 2(v - w)

or v + w = 2v - 2w

or v = 3w

i.e., velocity of each train is 3 times the velocity of wind.