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by mi11ertime
Mon Sep 06, 2010 4:19 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Rbt drove there at 55, back at 45; took 2hrs longer back
Replies: 1
Views: 1253

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

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?

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