Hye Lim drank 4/3 gallons of water in 11/2 hours. At this rate, how long will it take her to drink 4 gallons of water?

Hye Lim’s rate is (4/3) ÷ (11/2) = 8/33 gallons per hour. To drink 4 gallons at that rate takes 4 ÷ (8/33) = 4 × (33/8) = 33/2 hours. Therefore, the correct choice is 33/2 hours.

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