SOLUTION: Joe and Ann rode their bike 6 miles uphill at a rate of 10 miles per hour. they rode back down at a rate of 15 miles per hour. what was their average speed? How long were they ridi

Question 952152: Joe and Ann rode their bike 6 miles uphill at a rate of 10 miles per hour. they rode back down at a rate of 15 miles per hour. what was their average speed? How long were they riding?
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
Up=6mi/10mi/hr=0.6 hr
Down=6mi/15 mi/hr=0.4 hr
Distance=distance up+distance down=6mi+6mi=12mi
Total time=time up+time down=0.6hr+0.4hr=1 hour ANSWER 1: They were riding for 1 hour.
Average speed=total distance/total time=12 miles/1 hour=12 miles/hour
ANSWER 2: Their average speed was 12 miles/hour.

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