Question
Billy took 6 hours to drive from Point Y to Point Z while Daniel took 4 hours to drive from Point Z to Point Y. When they met each other, they were 40 km away from the midpoint of Point Y and Point Z. What was Daniel's speed?
3 m

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Billy took 6 hours to drive from Point Y to Point Z while Daniel took 4 hours to drive from Point Z to Point Y. When they met each other, they were 40 km away from the midpoint of Point Y and Point Z. What was Daniel's speed?