Difference between revisions of "1952 AHSME Problems/Problem 10"
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Latest revision as of 16:11, 18 July 2015
Problem
An automobile went up a hill at a speed of miles an hour and down the same distance at a speed of miles an hour. The average speed for the round trip was:
Solution
Let , , and represent the rate, time, and distance (respectively) of each trip. We know that , or . Because it is given that , . Furthermore, . The average speed can be expressed as .
See also
1952 AHSC (Problems • Answer Key • Resources) | ||
Preceded by Problem 9 |
Followed by Problem 11 | |
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All AHSME Problems and Solutions |
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