Question

Two train are moving with equal speed in opposite directions along two parallel railway tracks. if the wind is blowing with speed u along the track so that the relative velocities of the trains with respect to the wind are in the ratio 1:2, then the speed of each train must be

Answer 1

Since, two paralell trains are moving in the speed, they are having a uniform speed.

However, the velocities are in he ratio, 2:1.

This means that the train that is moving along with the speed of of wind = (v+u) and the train moving against the speed of the wind = (v-u).

Therefore, (v+u) / (v-u) = 2 / 1, or, v = 3u. This is the correct answer.

Answer 2

Answer:

correct answer is 3u

Explanation:

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