A spherical snowball is melting in such a way that its radius is decreasing at rate of 0.4 cm/min. At what rate is the volume of the snowball decreasing when the radius is 14 cm. (Note the answer is a positive number).

Preview Question 6   $\displaystyle \frac{\text{cm}^{{3}}}{\text{min}}$

Hint: The volume of a sphere of radius r is $\displaystyle {V}=\frac{{4}}{{3}}\pi{r}^{{3}}$