SOLUTION: For her workout, Sarah walks north at the rate of 4 mph and returns at the rate of 5 mph. How many miles does she walk if the round trip takes 4.5 hours?

SOLUTION: For her workout, Sarah walks north at the rate of 4 mph and returns at the rate of 5 mph. How many miles does she walk if the round trip takes 4.5 hours?

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Question 951834: For her workout, Sarah walks north at the rate of 4 mph and returns at the rate of 5 mph. How many miles does she walk if the round trip takes 4.5 hours?
Answer by andora(7) (Show Source): You can put this solution on YOUR website!
if mph is mile per hour then we assume it took her 2.5 hours to go north and 2 hours to come back and the we multiply 2.5x4=10miles and 2x5=10miles then we 10+10=20miles
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