Aspherical balloon is inflated with a gas at the rate of 500 cm3/min. how fast is the radius of the balloon increasing at the instant the radius is 30 cm? a. 5/(36pi)cm/min
b. 2/(18pi)cm/min
c. 4/(9pi)cm/min
d. 7/(24pi)cm/min

The volume of the sphere is expressed in the formula V = 4/3 pi r^3. The rate of change of volume is determined by differentiating the formula: dV/dt = 4pi r^2 dr/dt. When we substitute 500 cm3/min as dV/dt and 30 cm as r. Then dr/dt is equal to 0.0442 cm/min

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