Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km h–1 in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 ms–2. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?
asked Jul 01 12:00:00 AM