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When Jaya divided surface area of a sphere by the sphere’s volume, she got the answer as $\dfrac{1}{18}$ cm. What is the radius of the sphere?

24 cm
6 cm
54 cm
4.5 cm
Explanation:


$\dfrac{4 \pi r^2}{\dfrac{4}{3} \pi r^3}$ = $\dfrac{1}{18}$

∴ $\dfrac{3}{r}$ = $\dfrac{1}{18}$

∴ r=54 cm
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Answer
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