Question 215394
She walk 3 miles in 45 min what was her average rate in min per miles?  in miles per hour?


Step 1.  speed = distance/time


Step 2.  Given, 1 hour = 60 minutes then 45 minutes* 1 hour/60 minutes = 0.75 hour


Step 3.  Speed or average rate = 3 miles/(0.75 hour)=12/3 mph= 4 mph


Step 4.  ANSWER:  The average rate is 4 miles per hour.


I hope the above steps and explanation were helpful. 


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Respectfully, 
Dr J