For this case we have that by definition, the volume of a cone is given by:

Where:
r: It is the radius of the cone
h: It is the height of the cone
According to the statement data we have:

Substituting in the formula:

We cleared the radius:

We choose the positive value:

We round and we have that the radius of the cone is:

ANswer:

The general equation for a linear equation is 
- y is the y-coordinate
- x is the x-coordinate
- m is the gradient of the slope
- c is where is passes through the y axis
So if you breakdown this equation (
) you are able to see that 2/3 is in the same spot as 'm' which is the gradient or slope of the line.
Also if there was a negative infront of 'm' then the gradient would slope down '\' instead of up '/'
The answer is 18m^2. if u find the area of each section and add it up together at the end then u get 18