Question
Mark and Zoe left Town E for Town F at the same time. When Mark reached Town F in 4 hours, Zoe had only completed 47 of the distance between the two towns. Zoe's speed was 30 km/h slower than Mark. What was Mark's speed?
5 m

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Mark and Zoe left Town E for Town F at the same time. When Mark reached Town F in 4 hours, Zoe had only completed 47 of the distance between the two towns. Zoe's speed was 30 km/h slower than Mark. What was Mark's speed?