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A commuting student leaves home and drives to school at an average speed of 41.0 km/h....

A commuting student leaves home and drives to school at an average speed of 41.0 km/h. After 21.0 min she realizes that she has forgotten her homework and returns home to get it at the same average speed. It takes 7.0 min to find the report, after which the trip to school 41.0 km away to the east is resumed at the same speed as before. What is the average speed for the entire trip ? What is the average velocity for the entire trip

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