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21 Mar 2017, 05:32
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Train A departs Roseville heading for Springtown at 10 p.m. and train B departs Springtown at the same time headed to Roseville on a parallel track. If train A travels at 80 miles per hour and train B travels at 85 miles per hour and the distance from Springtown to Roseville is 660 miles, then how long will it take for the two trains to be at the same point relative to Springtown?
A. 3.5
B. 3.8
C. 4
D. 8
E. 8.25
A. 3.5
B. 3.8
C. 4
D. 8
E. 8.25
21 Mar 2017, 11:08
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The time taken by the two trains to meet at a point =
Total Distance/ Sum of the speed of the two trains (as the trains are travelling in opposite direction) = 660/(80+85) =660/165 = 4
Answer is C. 4
Total Distance/ Sum of the speed of the two trains (as the trains are travelling in opposite direction) = 660/(80+85) =660/165 = 4
Answer is C. 4
22 Mar 2017, 03:35
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total speed of two trains 80 + 85= 165
165=\(\frac{660}{time}\)
time= 4 hours
C - answer
165=\(\frac{660}{time}\)
time= 4 hours
C - answer
