SOLUTION: Helene lives 12 miles from work. On Monday morning, she drove to work in 15 minutes. Coming home, it took her 30 minutes. What was her average speed on Monday?

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Question 847576: Helene lives 12 miles from work. On Monday morning, she drove to work in 15 minutes. Coming home, it took her 30 minutes. What was her average speed on Monday?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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Helene lives 12 miles from work. On Monday morning, she drove to work in 15 minutes. Coming home, it took her 30 minutes. What was her average speed on Monday?
:
Since we will be dealing in mph,
30min = .5 hrs
15min = .25 hr
:
Av speed = total dist/total time
Av = 24%2F%28%28.5%2B.25%29%29
Av = 32 mph