Question
Ethan and Diana left Town L for Town M at the same time. When Ethan reached Town M in 3 hours, Diana had only completed 47 of the distance between the two towns. Diana's speed was 21 km/h slower than Ethan. What was Ethan's speed?
5 m

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Ethan and Diana left Town L for Town M at the same time. When Ethan reached Town M in 3 hours, Diana had only completed 47 of the distance between the two towns. Diana's speed was 21 km/h slower than Ethan. What was Ethan's speed?