Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

A gasoline tank on a certain tractor holds 16 gallons of gasoline. If the tractor requires 7

(A) 

(B) 

(C) 

(D) 

(E) 

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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 . Cross-multiplying and solving for x gives you the answer of  , or acres.