Could you help me with this math question please?

mercenary
Sat, 24 May 2008 23:52:32 +0000

The central angle is 1080/(pi) r

so 1080/(pi) r /360 x 2 pi (r + 3)
3/pi r x 2pi (r + 3)
cancels the pi’s you get

3/r x 2(r +3)
6(r + 3)/r or 6r + 18/r

Yes the answer is definitely E.