Question

If a circle has a diameter of (x+3) inches, what is its circumference?

A. (x(Pi) +3(Pi)) inches
B. (2x(Pi)+6(pi)) inches
C. (x+3)(pi) inches/2
D. (xsquared+6x+9) inches

Answer 1

Answer: Option A.

Explanation:

diameter (d) = radius (r) × 2

r = d / 2

r = ( x + 3 ) / 2

Now,

Circumference = 2 × π × r

Circumference = 2 × π × ( x + 3 ) / 2

Circumference = π × ( x + 3 )

Circumference = xπ + 3π inches