Question

Find the exact circumference of a circle with the given radius. 3½ cm C = 7.5π cm 7π cm 6.25π cm

Answer 1

C = 2 * (pi) * r
C = 2 * (pi) * 3.5.....3 1/2 = 3.5
C = (2 * 3.5) * (pi)
C = 7(pi) cm <===

Answer 2

Answer:

(B) $7{\pi}cm$

Step-by-step explanation:

We are given the radius of the circle that is equal to $3\frac{1}{2}cm$.

Now, circumference of circle is given as:

$C=2{\pi}r$

$C=2{\pi}(3\frac{1}{2})$

$C=2{\pi}(\frac{7}{2})$

$C=7{\pi}cm$

Therefore, the circumference of the circle is $7{\pi}cm$.

Hence, option B is correct.