A train is moving at 4/5 of its usual speed. The train is 45 minutes too late. What is the usual time (in hours) for the train to complete the journey?
Choose the correct choice from the following choices:
A) 1
B) 1.5
C) 2
D) 2.5
E) 3

Rationale: new time = d / ( 4 v / 5 ) = 5 / 4 * usual time 45 minutes represents 1 / 4 of the usual time . the usual time is 4 * 45 minutes = 3 hours . the answer is e .
Answer: E