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Train a is gong 80 and b is going 90 train a passes the station at 125am Train b passes the same station at 137am what time will B catch up with A?
Wiki User
∙ 12y ago
If they are going in opposite directions, train B will not catch up train A - it passed it at 1:25am + 90 x 12 ÷ (90 + 80) minutes = 1:25am + 66/17 minutes which is just after 1:31 am
If they are going the same way at constant speed with enough track, train B will catch up train A once it has covered the distance Train A has covered in the time between 1:25 am and 1:37 am at the difference between their speeds; this means it will catch it up at 1:37 am + 80 x 12 ÷ (90 - 80) minutes = 1:37 am + 96 minutes = 3:13 am.
Wiki User
∙ 12y ago
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Train A is going 80mph and B is going 90 mph train a passes a station at 125am train b passes same staion at 137am what time will train b catch up to A?
Train B will catch up to train A at 2:47am
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At 2:45, Train-A has a 1/2-hour lead on Train-B = 1/2 of the speed of Train-A = 5 miles.Train-B overtakes Train-A at the rate of (50 - 40) = 10 miles per hour.It takes Train-B (5/10) = 1/2 hour to make up the deficit.Train-B catches up to Train-A at 3:15 AM.
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