Calculus
# Related Rates

A spherical fish tank of radius 10 meters is being filled with at a constant rate of $R\pi$ cubic meters of water per second. At height 6 meters, the rate of change of the height is 1 meter per second. What is the value of $R$?

**Details and assumptions**

The height is measured from the bottom of the sphere (i.e. in contact with the ground).