<PRE><B>Question 517253</B>
when susan drove to work this morning she averaged 60 miles per hour.because of an accident she only averaged 20 miles per hour for her drive home. if her total time travel is 2 hours, how long did it take her to drive to work and how long did it take her to get home?
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The avg speed for the round trip is
2*60*20/(60+20) = 30 mi/hr
30 mi/hr * 2 hr = 60 miles RT, 30 miles each way
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30 mi @ 60 = 30 minutes
30 mi @ 20 = 90 minutes

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