Related Rates, Volume of liquid change

[Deathfish]

Water is emptied from a spherical tank of radius 24 ft. The water in the tank is 8 ft deep and its level is decreasing at the rate of 2 ft/ min. At this time, what is the rate of change of the radius at the top of the water?

 

[Whitishcube]

have you done any work yourself? show us what you've done and we can help you.

anyway, i would start off by finding the formula for the volume of a sphere, as well as listing down all the given information (ex. dV/dt=...)