# unit rate

Marathon wheelchair division is 1hr 18min.and 27sec.
Marathon is 26.2 miles long. What is the average speed of the winner in the wheelchair division? round to the nearest hundred
help I don't get it.

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1. time = 1 : 18 : 27
= 1 hr + 18/60 hrs + 27/3600 hrs
= 1.3075 hrs

speed = 26.5/1.3075 mph
= 20.26768 mph

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posted by Reiny

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