A certain train will travel from City A to City B.

A certain train will travel from City A to City B. and then back to City A along the same route. The train is scheduled to spend a total of T hours traveling lime for the round-trip. The train travels from City A to City B in 13 hours, traveling at an average speed of 25 miles per hour. If the train is to arrive exactly on schedule, at what average speed must the train travel from City B to City A ?

A)

B)

C)

D)

E)