Sydney A.
asked • 03/03/15Another train leaves Boston for New York on an adjacent set of tracks at 4:00 P.M. and averages 40 mph. At what time will the trains meet?
A train leaves New York for Boston, 200 miles away, at 3:00 P.M. and averages 75 mph. Another train leaves Boston for New York on an adjacent set of tracks at 4:00 P.M. and averages 40 mph. At what time will the trains meet? (Round to the nearest minute.)
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1 Expert Answer
Barbara H. answered • 03/04/15
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Enthusiastic mathematics teacher and World Record Swim Coach
After the first hour, the trains are only 125 miles apart. (The Boston train doesn't start til 4:00 p.m.)
Distance = Rate x Time 125 = 75t + 40t 125 = 115t 125/115 = 115t/115
125/115 = 1.086956522 x 60 minutes = 65.2173913 = 65 minutes
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Barbara H.
03/03/15