SAT Math Multiple Choice Practice Question 351: Answer and Explanation

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Question: 351

21. The volume of right cylinder A is twice the volume of right cylinder B. If the height of cylinder B is twice the height of cylinder A, then what is the ratio of the radius of cylinder A to the radius of cylinder B?

A. 1 to 2
B. 1 to 1
C.
D. 2 to 1
E. 4 to 1

Correct Answer: D

Explanation:

D The volume of a cylinder is equal to πr2h. Let's say that the radius of cylinder A is a and the radius of cylinder B is b. Since the height of cylinder B is twice the height of cylinder A, if the height of cylinder A is h, then the height of cylinder B is 2h. The volume of

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