SOLUTION: Joe and Ann rode their tandem bike uphill for 6 miles at a speed of 10 miles per hour. They rode back down along the same route at a rate of 15 miles per hour. What was their aver-

SOLUTION: Joe and Ann rode their tandem bike uphill for 6 miles at a speed of 10 miles per hour. They rode back down along the same route at a rate of 15 miles per hour. What was their aver-

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Question 1084562: Joe and Ann rode their tandem bike uphill for 6 miles at a speed of 10 miles per hour. They rode back down along the same route at a rate of 15 miles per hour. What was their aver- age speed and how long were they riding?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
6 miles x 1 hr/10 miles=.6 hours
6 miles x 1 hr/15 miles=.4 hours
12 miles/(.6+.4)hrs=12 miles hour
They rode for 1 hour, total, at an average speed of 12 mph. ☺☺☺☺
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