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You drive on Interstate 10 from San Antonio to Houston, half the time at 63 km/h and the other half at 86 km/h. On the way back you travel half the distance at 63 km/h and the other half at 86 km/h.

(a) What is your average speed from San Antonio to Houston?

km/h

(b) What is your average speed from Houston back to San Antonio? and

km/h

(d) What is your average velocity for the entire trip?

km/h

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