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SAT官方每日一题附答案和解析[数学](2017年11月17日)
日期:2017-11-17 10:02

(单词翻译:单击)

每日一题

Mathematics>Standard Multiple Choice

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

S=4πr^2

The formula above gives the surface area, S, for a sphere with radius r. Sphere A has a surface area that is 64 times greater than the surface area of sphere B. What is the ratio of the radius of sphere A to the radius of sphere B?

A.4:1
B.8:1
C.16:1
D.64:1

答案和解析

答案:B

解析:

Choice B is correct.

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