Louise runs the first half of a race at 5 miles per hour. Then she picks up her pace and runs the last half of the race at 10 miles per hour. What is her average speed on the course?
Hint! The answer is not 7.5. Begin by deciding on a distance for the race. Any distance that you choose will give you the same answer.
Click comment to post your answer. Please include and explanation.
Take some time to review you know of coordinate geometry.
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1 comment:
15mi/1.5hr = 10mi per hr, is it right?
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