Discussion Forum

How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

Answer:

Explanation:

Speed of train relative to man $=(63-3)$ km/hr $=60$ km/hr

$=\left(60\times\frac{5}{18}\right)$ m/sec $=\frac{50}{3}$ m/sec.

$\therefore$ Time taken to pass the man $=\left(500\times\frac{3}{50}\right)$ sec = 30 sec.