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solve Problem on Train based Questions Quickly
描述
http://goo.gl/9JPA0m
Get awesome methods to do fast calculations
Time taken by a train of length / metres to
pass a pole or a standing man or a signal post
is equal to the time taken by the train
Get awesome methods to do fast calculations
Time taken by a train of length / metres to
pass a pole or a standing man or a signal post
is equal to the time taken by the train
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