a train leaves a station and travels north at 75km/h. Two hours later a second train leaves on a parallel track and travels north at 125 km/h. How far from the station will they meet?
Let t hours be the time the second train travels when the two train meets
By that time the first train has traveled 2 x 75 + 75 t = 150 + 75t
The second train has traveled 125 t
Hence 125 t = 150 + 75t
subtract 75 t from both sides
125 t - 75t = 150 + 75t -75t
50 t = 150
Divide both sides by 50
t = 150/50 = 3 hours
Hence the distance traveled by second train = 125 x 3 = 375 miles
(first train has also traveled 150 + 75 x 3 = 375 miles
Answer _ the twp trains meet at a distance of 375 miles from the station
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