A motorist travels 160 km at 40 km/h and 160 km at 100 km/h. What is the average

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HappyKnife

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speed of the motorist for...? A motorist travels 160 km at 40 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?

This is just an example of one of the review questions i found in my book. How would I answer this?
 
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