yaqueen2 yaqueen2

06-05-2017
English

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Sarah roller skates 18.5 km in 3 1/12 hours what is average speed in miles per hour?

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ayugmaacharya ayugmaacharya

06-05-2017

Convert 18.5 km to miles. 1 km = 0.6214 miles. Then 18.5 km = (0.6214 X 18.5)miles = 11.5 miles. Speed = distance / time. Then:

s = 11.5 / 3.5 = 3.286 miles / hr

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