SOLUTION: if you bike a distance of 10 km at 30 km/hr, and then return at 20 km/hr, what is the average speed for the whole trip?

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Question 819468: if you bike a distance of 10 km at 30 km/hr, and then return at 20 km/hr, what is the average speed for the whole trip?
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
{Total Distance}/{Total Time}

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