A man walks down the road for half an hour at an average speed of 3 miles per hour. He waits 10 minutes for a bus, which brings him back to his starting point at 3: If the man began his walk at 2:25 the same afternoon, what was the average speed of the bus?
A 1.5 mph
B 3 mph
C 4.5 mph
D 6 mph
Solution
Correct Answer: Option E
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