67.2k views
3 votes
Find the exact circumference of a circle with the given radius. 3½ cm C = 7.5π cm 7π cm 6.25π cm

2 Answers

5 votes
C = 2 * (pi) * r
C = 2 * (pi) * 3.5.....3 1/2 = 3.5
C = (2 * 3.5) * (pi)
C = 7(pi) cm <===
User Tarfa
by
6.8k points
5 votes

Answer:

(B)
7{\pi}cm

Explanation:

We are given the radius of the circle that is equal to
3(1)/(2)cm.

Now, circumference of circle is given as:


C=2{\pi}r


C=2{\pi}(3(1)/(2))


C=2{\pi}((7)/(2))


C=7{\pi}cm

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

Hence, option B is correct.

User Avi Fatal
by
7.6k points