A train crosses two persons travelling at the rates of 6 km/hr and 8 km/hr in the same direction in 12 sec and 16 sec, respectively. Find the speed of the train.

Let the speed of the train be x km/hr. So, speed of the train with first person in the same direction = (x - 6) km/hr  And speed of the train with second person in the same direction = (x - 8) km/hr So, the length of the train = (x - 6) * 12/60 = (x - 8) * 16/60 After solving, we get  x = 14 So, speed of the train = 14 km/hr