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The houseboat travels 100 miles downstream in the same time it takes to go 60 miles upstream. If the speed of the houseboat is 20 mph in still water, what is the speed of the current?
On a visit to the Grand Canyon, a tourist took an excursion and went one-third of the way on foot, 10 miles by boat, and one-sixth of the way by mule. How long was the excursion?
Five packs of graph paper and 30 rulers costs 40.00. Twelve packs of graph paper and 20 rulers cost 44.00. What is the cost of 1 ruler?
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