Math
posted by Erin .
Sue was in excellent shape in high school, she could ride her 10speed bicycle 4.8miles to her grandmother's house in 11 minutes. Her return trip home took 14 minutes. The times are different due to there being a slight downhill slop on part of the trip to her grandmothers. If sue was able to ride her bike on a perfectly flat surgace with no hills, how fast can he travle in miles/hour?
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