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?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 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.
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