Mathematics > Standard Multiple Choice

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

A right circular cylinder has height 6 and volume . What is the circumference of its base?

(A)

(B)

(C)

(D)

(E)

答案见下一页>>>

The correct answer is C

Explanation

The volume of a cylinder with radius r and height h is equal to . Therefore,  and , so the radius of the cylinder is 3. The circumference of a circle with radius r is equal to ; therefore, the circumference of the base is equal to .