How do I to solve r = 11ft?

We don't see a question, only data, i.e. r=11 ft, probably meaning the radius is 11'.

If you need the circumference, then
Circumference = 2*π*r
=22π
=69 ft. approximately

To solve for r in the equation r = 11ft, there is actually nothing to solve for because r is already equal to 11ft.

In simple terms, r is already given as 11ft, so there is no need for any mathematical operations to find its value.

To solve for "r = 11ft", it appears to be a simple equation where "r" represents the value you need to find, which is equal to 11ft. However, if you are looking for a more detailed explanation:

It seems like you are given the equation "r = 11ft" without any additional context. From this equation, we can assume that "r" represents the value of a variable or unknown quantity in feet (ft).

To solve for "r," you don't need to perform any calculations because the equation itself provides the solution. The value of "r" is already given as 11ft. This means that there is no need for any further calculations or steps to solve this equation.

In summary, based on the equation "r = 11ft," the solution is that the value of "r" is equal to 11ft.