The circumference is approximately 62.8.
Explanation:
The formula for the circumference of a circle is:
C = πd
where C is circumference, π is the constant pi (approximately 3.14), and d is the diameter of the circle.
Plugging in the given diameter of 20, we get:
C = 3.14 x 20
C = 62.8
Rounding to the tenths place gives us an answer of approximately 62.8.