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During a trip, a bus travels 11 km with an average velocity of 21 m/s, but then travels in the same direction for the next

During a trip, a bus travels 11 km with an average velocity of 21 m/s, but then travels in the same direction for the next 1.0 km at a smaller average velocity of 4.2 m/s, due to the presence of highway construction crews.

Determine the average velocity of the bus for the entire trip in m/s

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