Original Rate, Length of Track: Solutuion and Explanation

[Guest]

A train, after traveling 1 hr., is delayed for 1 hr., after which it travels at 3/5 of the previous rate, and arrives at the destination 3 hrs. behind schedule. If the delay had occurred 50 mi. later, arrival time would be 1 1/3 hrs. earlier. Calculate A) original rate, and B) length of line.


Solution provided with problem:

Please explain. Thanks.

[Guest]

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