Question 1147445
An old car has to travel a 2-mile route, uphill and down. Because it is so old, the car can climb the first mile-the ascent-no faster than an average speed of 15 mi/h. How fast does the car have to travel the second mile-on the descent it can go faster, of course-in order to achieve an average speed of 30 mi/h for the trip?
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Sort of a "trick question."
An average of 30 mi/hr is not possible.  Time is up.