表面积-球体练习题在线| Brilliant

The surface area of a sphere with radius $5$ is equal to $M \pi$ , where $M$ is a positive integer. Determine the value of $M$ .

Given a sphere with volume $\frac{32}{3}\pi$ , what is the surface area of the sphere?

{16}\pi

{18}\pi

{12}\pi

{14}\pi

Given a solid hemisphere with radius $12,$ what is the total surface area of the hemisphere?

{420}\pi

{432}\pi

{588}\pi

{576}\pi

Given a sphere with radius $7$ and surface area $A$ , if the radius of the sphere is increased to $2 \times 7$ , and the resulting surface area is $c A$ , what is the value of $c$ ?

The above diagram shows a quarter circle with radius $10.$ If the quarter circle is rotated $360^\circ$ around line $l,$ what is the surface area of the resulting body?

{410}\pi

{290}\pi

{400}\pi

{300}\pi

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Surface Area - Sphere