Radius is 11cm
diameter is 22cm
Answer:

Step-by-step explanation:
The given expression is 26.48. We need to write the equivalent expression for it. There are two numbers after decimal. It means that we can divide 2648 by 100 i.e.

We know that, 2648 = 662 × 4 and 100 = 25 × 4

Hence,
is the equivalent expression.
A=pir^2
a=pi13^2
a=169pi
a=530.66 square cm
I think it's could be wrong though 5/10