A Spherical Balloon Is Inflated at the Rate of 10 $\frac { 80 } { 3 }$

Multiple Choice

A spherical balloon is inflated at the rate of 10 m³/min when the radius is 3 m. The rate of increase of the surface area of the balloon is

A) $\frac { 80 } { 3 }$
B) $\frac { 40 } { 3 }$
C) $\frac { 20 } { 3 }$
D) $\frac { 20 } { 3 }$ .
E) $\frac { 5 } { 3 }$