question_answer

                                                                                           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 steam tracks. If one stream track is double than the other, what is the speed of each train?

Answer:

                                                                      Let v and w be the velocity of each train and wind respectively. As per question, \[\left( \upsilon +\text{w} \right)=\text{2}\left( \upsilon -\text{w} \right)\]or v = 3 w, i.e., velocity of each train is 3 times the velocity of wind.