### Home > PC > Chapter 6 > Lesson 6.1.1 > Problem 6-16

6-16.

Determine the radius when the cone is filled.

Set up and solve a proportion relating the area with the rate of evaporation.

When the cone is full, it has 120*π* m^{3} of water in it.

What is the volume of water in the cone when it is half full?

Calculate *r* when the cone is half full. Then set up a proportion with area and evaporation rate similar to the one in part (a).