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April 18, 2014

April 18, 2014

Posted by **susie** on Monday, August 22, 2011 at 10:16pm.

- algebra -
**drwls**, Tuesday, August 23, 2011 at 1:46amLet the construction zone driving time be T hours. Then, 1.5 - T hours were spent driving at 60 mph. The total distance driven is

30*T + 60*(1.5 - T) = 72 miles

90 - 72 = 30 T

T = 0.600 hours = 36 minutes

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