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Mathematics 9 Online
OpenStudy (anonymous):

on marys walk she covers 3 miles in 1 hour and on the way back it takes her 1 and a half hours . what is her average speed. how did you get your answer?

OpenStudy (saifoo.khan):

Speed = distance covered/time.

OpenStudy (anonymous):

the answer is 2.4 mph and i dont know how.

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