Wind is blowing west to east along two parallel tracks. Two trains moving with the same speed in opposite directions have the same steam tracks, if one is double than the other, what is the speed of each train?
Let v and w be the velocity of each train and wind respectively.
According to the question, we have
(v+w) = 2 (v-w)
That is, velocity of each train is 3 times the velocity of wind.