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SAT官方每日一题 2017年6月21日.

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SAT试题类型 Mathematics > Standard Multiple Choice

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

What is the volume of a cube with surface area ?

(A) 9 * (x^2) (B) 27 * x^3 (C) 81 * (x^2) (D) 81 * (x^3) (E) 729 * (x^3)

答案:B

Explanation

Every cube has identical square faces. Since the total surface area of this cube is , each face has area . Therore, each edge has length , or . The volume is , or .

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