The distance between two station is 340km. Two trains start simultaneously from these station on parallel tracks to cross each other. The speed of one train of them is greater that then of other by 5 km/hr . If the distance between two trains after 2h of their start is 30km the speed of each train is

Solution (By Examveda Team)

Let the trains be A and B.
Speed of A = x km/h
Speed of B = (x+5) km/h  

After 3 hours,
distance traveled by A = 2x km
distance traveled by B = 2(x+5) km = 2x+10 km
now distance between them is 30km
So 2x + (2x+10) + 30 = 340  
4x + 40 = 340
x = 300/4 = 75 km/h
x + 5 = 75+5 = 80 km/h
Speed of the trains are 75 km/h and 80 km/h