Air is being pumped into a spherical balloon at a rate of 20 in3min-1. How fast is the radius of the balloon increasing when the radius is 6 in ? Volume of a sphere with radius r is \( \frac{4}{3} \pi r^{3} \)
A 0.0530 in/min
B 0.0442 in/min
C 0.0354 in/min
D 0.265 in/min
Solution
Correct Answer: Option B