Kathy ran up a hill at 5 miles per hour and down the same hill at 10 miles per hour. How many miles per hour was her average speed? Express your answer as a decimal to the nearest tenth.
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Answer:
6.7mph
Step-by-step explanation:
since the distance travelled is same
avg velocity=2v1v2/(v1+v2)
=2×5×10÷(10+5)
=100/15=20/3
=6.7mph
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