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27 Dec 2021, 05:45
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (01:36) correct
35%
(01:34)
wrong
based on 40
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A spherical balloon has a volume of \(972\pi\) cubic cm, what is the surface area of the balloon in sq. cm?
(A) 324
(B) 729
(C) \(243 \pi\)
(D) \(324\pi\)
(E) \(729 \pi\)
(A) 324
(B) 729
(C) \(243 \pi\)
(D) \(324\pi\)
(E) \(729 \pi\)
29 Dec 2021, 08:32
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Bunuel
The volume of a sphere = \(\frac{4}{3}*\pi*r^3\)
The surface area of a sphere = \(4*\pi*r^2\)
ATQ, \(\frac{4}{3}*\pi*r^3\) = \(972\pi\)
Find the value of r (=9)
Now, \(4*\pi*9^2\)
Area = \(324\pi\)
