The radius of an air bubble is increasing at the rate of (1/2) cm / s. At what rate (. in .cm 3 / s ) is the volume of the bubble increasing when the radius is 1 cm ? (Take π=3.14 ) (A) (B) (C) (D)

Q. The radius of an air bubble is increasing at the rate of $\frac{1}{2}$ $c m / s$ . At what rate $($ in $c m^{3} / s)$ is the volume of the bubble increasing when the radius is $1 c m$ ?
(Take $π = 3.14$ )

174 208 Physical World, Units and Measurements Report Error

Answer: 6.28