Question

A trains are 2km apart.speed of one train is 20 m/s and the other is running at 30 m/s.length of the trains are 200 n 300m .in how time do the train cross each other

Answer 1

Relative speed of the trains=(20+30)m/s=50 m/s

Total distance to cross each other=2km+200m+300m=2500m

So,

Time to cross=dist./speed=2500/50= 50 sec.