the distance between two railway station A and B is 455 km. Two train facing each other start from these station simultaneously on two parallel tracks . The speed of one train is 5 km/hr more than that of the other. If 3 hours after starting the difference between two trains is 20 km , find the speed of each train?
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Answer:
Step-by-step explanation:
Let the trains be A and B.
Speed of A = x km/h
Speed of B = (x+5) km/h
After 3 hours,
distance travelled by A = 3x km
distance travelled by B = 3(x+5) km = 3x+15 km
Since, distance between them is = 20km
So 3x + (3x+15) + 20 = 425
6x + 35 = 425
6x = 425 – 35 = 390
x = 390/6 = 65 km/h
x + 5 = 65+5 = 70 km/h
Thus, the speed of the trains are 65 km/h and 70 km/h.
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