Problems on Trains (Solved)

Two trains start towards each other and meet somewhere in between. After that they reach their destinations after 16 and 9 hours respectively. What is the speed of the second train, if the first one travels at 120 km/h?

By the shortcut formula, $v_1/v_2 = √{16/9}$ ⇒ $v_1 = 120 × {4/3}$ = 160 km/h. But for the detailed discussion from zero level please refer the video below.

The solution of the above problem is contained inside this video. Since many other questions are also contained in this, you might have to search a bit in this video.