A train travels from Albany to Syracuse, a distance of 120 miles, at the average rate of 40 miles per hour. The train then travels back to Albany from Syracuse. The total travelling time of the train is 5 hours and 24 minutes. What was the average rate of speed of the train on the return trip to Albany?  Choose the correct choice from the following answers:
A) 45
B) 20
C) 30
D) 40
E) 50

Rationale: "40 * t = 120 therefore t = 120 / 40 = 3 on return speed * ( 5.4 - 3 ) = 120 therefore t = 120 / 2.4 = 50 e"
Answer: E