A train is moving at 4/5 of its usual speed. The train is 30 minutes too late. What is the usual time (in hours) for the train to complete the journey?
Choose the correct choice:
A) 1	B) 1.5	C) 2	D) 2.5	E) 3
new time = d / (4v/5) = 5/4 * usual time   30 minutes represents 1/4 of the usual time.   The usual time is 2 hours.   The answer is 2.
<result>C</result>
A train is moving at 4/5 of its usual speed. The train is 30 minutes too late. What is the usual time (in hours) for the train to complete the journey?