Question

*Will give medal* What is the exact diameter of a circular rug with a circumference of twenty-one feet?

Answer 1

rug?

Answer 2

yes.

Answer 3

like a object

Answer 4

$$\huge C=2\pi r$$

Answer 5

Whatever.
Look, Circumference equals 2*Pi*radius.
In the problem (God! why does that book have so many problems!)
2*Pi*radius= 21
This implies, Radius=21/(2*Pi)
Diameter= 2*21/2Pi
Therefore answers 21 by Pi feet

Answer 6

Thank you.