Question
David and Lucy left Town G for Town H at the same time. When David reached Town H in 3 hours, Lucy had only completed 57 of the distance between the two towns. Lucy's speed was 18 km/h slower than David. What was David's speed?
5 m

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David and Lucy left Town G for Town H at the same time. When David reached Town H in 3 hours, Lucy had only completed 57 of the distance between the two towns. Lucy's speed was 18 km/h slower than David. What was David's speed?