SAT I 一日一问:2014年8月15日

所属专题:出国留学  来源:    要点:SAT官方题目  
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The correct answer is A

Explanation

In the question, you are told that 7 gallons of gasoline can plow 3 acres and you are asked to find how many acres, call it x, can be plowed by 16 gallons. You can set up a ratio of the number of gallons of gasoline used to the number of acres plowed. Therefore, you have 7 over 3 = 16 over x. Cross-multiplying and solving for x gives you the answer of x = 48 over 7 acres, or 6 and (6 over 7) acres.

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