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4 March, 07:36

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

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  1. 4 March, 11:25
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    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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