Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 10.10 A.M. If train B oases the same station at 10:25 A.M., at what time will train B catch up to train A?
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time is only an illusion of relative motion
does it say anything about the two trains' starting at the same position, or anything like that?
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At the time train B catches up with train A, they would have traveled same distance from station except it would have taken Train B 15 min less time to get there.
**Note: 15 min = 0.25 hr
d = r*t
120(t-.25) = 100t
120t - 30 = 100t
20t = 30
t = 1.5
It took 1.5 hrs from time Train A passed station for train B to catch up, or at 11:40