SOLUTION: a train leaves Danville union and travels north at a speed of 75 km/h. three hours later, an express train leaves on a parallel track and travels north at 120 km/h. how far from th

Question 357748: a train leaves Danville union and travels north at a speed of 75 km/h. three hours later, an express train leaves on a parallel track and travels north at 120 km/h. how far from the station will they meet?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
a train leaves Danville union and travels north at a speed of 75 km/h. three hours later, an express train leaves on a parallel track and travels north at 120 km/h. how far from the station will they meet?
..
speed of train A = 75 km/h
3 hours it will travel 225 km.
..
train B speed = 120 km/h
they move in same direction one behind the other. so effective speed of train B = 120-75
= 45km/h
time = distance /speed
225/45
= 5 hours.
Train B travels at 10km/h
in 5 hours it will travel 5*120 = 600 km.
it will catch up after 600km.
...
m.ananth@hotmail.ca
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