How long must a driver take to drive the final 70 miles of a trip if he wants to

Question

How long must a driver take to drive the final 70 miles of a trip if he wants to average 50 miles an hour for the entire trip and during the first part of the trip he drove 50 miles in $$1\frac{1}{2}$$ hours ?

Options:

A . 54 min

B . 1 hr

C . 66 min

D . 70 min

Answer: Option A

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