What are the diameter and radius of a circle with a circumference of 48π yd?

A.
d = 24 yd
r = 12 yd

B.
d = 24 yd
r = 48 yd

C.
d = 12 yd
r = 24 yd

D.
d = 48 yd
r = 24 yd

please explain it beacause im so confused
ithought the radius was 7.65 and the diameter
was 15.3 BUT ITS NOT ITTTTT

Question

What are the diameter and radius of a circle with a circumference of 48π yd?
 
 
 A.
d = 24 yd 
r = 12 yd
 
 B.
d = 24 yd 
r = 48 yd
 
 C.
d = 12 yd 
r = 24 yd
 
 D.
d = 48 yd 
r = 24 yd

please explain it beacause im so confused 
ithought the radius was 7.65 and the diameter
was 15.3 BUT ITS NOT ITTTTT

jim_thompson5910 · Answer

One circumference formula is 

C = pi*d

where d is the diameter

jim_thompson5910 · Answer

So if the given circumference is 48pi, then...

C = pi*d

48pi = pi*d

48pi/pi = d ... Divide both sides by pi to isolate d.

48 = d

d = 48

jim_thompson5910 · Answer

Then you cut that diameter in half to get the radius

r = d/2

r = 48/2

r = 24

anonymous · Answer

think you forgot it said $48\pi$ and just thought if it as $48$

anonymous · Answer

OMG OMG THANK U SO MUCH YOU ARE THE BEST

jim_thompson5910 · Answer

you're welcome