PROBLEMS ON TRAINS

This chapter is similar to the Time And Distance . The only difference is that the length of the moving train is also considered in this chapter.

Some important things to be noticed in this chapter are :-

• When two trains are moving in opposite directions their speeds should be added to find the relative speed.
• When two trains are moving in same directions, the relative speed is the difference of their speeds.
• When a train passes a platform it should travel the length equal to the sum of the lengths of Trains and Platform Both.
• If two trains of lengths a meters and b meters are moving in opposite directions at u m/sec. and v m/sec., then time taken by the trains to cross each other = $\frac{(a+b)}{(u+v)}$ seconds
• If two trains of lengths a meters and b meters are moving in the same directions at u m/sec. and v m/sec. (u > v ), then time taken by faster train to cross the slower train is $\frac{(a+b)}{(u-v)}$ seconds