【GMAT考满分数学PS题库】Susan drove 30 miles for the whole trip. It takes _真题_答案_解析 GMAT考满分官网

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题目内容

Susan drove 30 miles for the whole trip. It takes her car 15miles per gallon for the first 10 miles, and 45 miles per gallon for the remaining trip. What is the total oil consumption?

A1
B3/2
C5/4
D8/7
E10/9

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正确答案: E

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