【GMAT考满分数学PS题库】After 4,000 gallons of water were added to a large_真题_答案

OG18-数学分册 - 数学PS - 50

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After 4,000 gallons of water were added to a large water tank that was already filled to $$\frac{3}{4}$$ of its capacity, the tank was then at $$\frac{4}{5}$$ of its capacity. How many gallons of water does the tank hold when filled to capacity?

A5,000
B6,200
C20,000
D40,000
E80,000

正确答案: E

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