Rbt drove there at 55, back at 45; took 2hrs longer back

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mi11ertime
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Joined: Mon Sep 06, 2010 4:14 am
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Rbt drove there at 55, back at 45; took 2hrs longer back

Postby mi11ertime » Mon Sep 06, 2010 4:19 am

Robert drove to the shore at an average speed of 55 mph and returned home over the same route at the average speed of 45 mph. It took him 2 hours longer on the return trip. What was his average speed for the entire trip?

andy44
Posts: 7
Joined: Sat Mar 21, 2009 12:40 pm

Re: Distance Problem

Postby andy44 » Mon Sep 06, 2010 4:40 pm

you can see how to set this up here
http://www.purplemath.com/modules/distance.htm


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