If at any instant t, for a sphere, r denotes the radius, S denotes the surface area and V denotes the volume, then what is \[\frac{dV}{dt}\] equal to?

\[\frac{1}{2}{{r}^{2}}\frac{dS}{dt}\]

If at any instant t, for a sphere, r denotes the radius, S denotes the

1.	If at any instant t, for a sphere, r denotes the radius, S denotes the surface area and V denotes the volume, then what is \[\frac{dV}{dt}\] equal to?
A.	\[\frac{1}{2}S\frac{dr}{dt}\]
B.	\[\frac{1}{2}r\frac{dS}{dt}\]
C.	\[r\frac{dS}{dt}\]
D.	\[\frac{1}{2}{{r}^{2}}\frac{dS}{dt}\]
Answer» C. \[r\frac{dS}{dt}\]

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If at any instant t, for a sphere, r denotes the radius, S denotes the surface area and V denotes the volume, then what is \[\frac{dV}{dt}\] equal to?

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