A train moving at 49 mph meets and is passed by a train moving at 63 mph. A passenger in the first train noted that the second train took 4.5 seconds to pass him. How long is the second train?
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The effective speed between the trains:(49+63)mph =112 mph
lets assume that the passenger is constant and the second train is passing him at 112mph
lets find speed in feet/sec
(112 ×5280)/3600=164.2
therefore Length of 2^nd train =164.2 ×4.5=739 approximately
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Answer:
1625289 ×(49×63)×4.5
= 60×60
= 740.46
Step-by-step explanation:
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