Posted by **Ash** on Tuesday, October 5, 2010 at 7:20pm.

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.80 m/s. During the second part, she rides for 36 minutes at an average speed of 5.20 m/s. Finally, during the third part, she rides for 8.0 minutes at an average speed of 12.6 m/s. What is her average velocity for the trip?

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