SOLUTION: therese drove for 3 hours at a speed of 40 mph, then for an additional 7 hours at a speed of 60 mph. what was her average rate of speed for the trip?
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Question 798598: therese drove for 3 hours at a speed of 40 mph, then for an additional 7 hours at a speed of 60 mph. what was her average rate of speed for the trip? Answer by Finavon(81) (Show Source):
You can put this solution on YOUR website! Distance travelled
3 hrs @ 40 = 120 miles
7 hrs @ 60 = 420 miles
Total 10 hrs 540 miles
Average speed 54 mph
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