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Carissa the chessplayer is a very, very slow walker. In fact, she walks at 100 meters per hour when walking uphill, 180 meters per hour when walking across flat ground, and 250 meters per hour when walking downhill. One day, Carissa walks across Boston from a café to a boba shop, and then takes the same route in reverse to return to the café. What was Carissa's average speed during the entire round trip?

 Mar 28, 2023
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Could you elaborate on what this route looks like, I'm guessing the total route has all flat, downhill, and uphill, but I have no total time to go on, thank you in advance.

 Mar 28, 2023

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