The volume of a sphere with radius $r$ is $\dfrac43\pi r^3$ and the surface area is $4\pi r^2.$ If a special ballo

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VJesus12: Legendary Member; Posts: 2276; Joined: Sat Oct 14, 2017 6:10 amFollowed by: 3 members

by VJesus12 » Wed Apr 28, 2021 5:54 am

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The volume of a sphere with radius $r$ is $\dfrac43\pi r^3$ and the surface area is $4\pi r^2.$ If a special balloon has a volume of $972\pi$ cubic centimeters, what is the surface area of the ballon in square centimeters?

A. $324$
B. $729$
C. $243\pi$
D. $324\pi$
E. $729\pi$

Answer: D

Source: GMAT Prep

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Source: Beat The GMAT — Problem Solving | Wed Apr 28, 2021 5:54 am

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