Two concentric circles form a ring. The inner and outer circumferences of ring are (352/7) m and (518/7) m respectively. Find the width of the ring.	Answers:
A) 2 B) 4 C) 6 D) 8 E) None of them
Let the inner and outer radii be r and R meters.   Then 2(22/7)r = (352/7) = r =((352/7) X (7/22) X (1/2))=8m.   2(22/7)R=(528/7) = R=((528/7) X (7/22) X (1/2))= 12m.   Therefore, Width of the ring = (R - r) = (12 - 8)= 
<gadget id="calculator">(12 - 8)</gadget>
<output>4</output>
4 m.   Answer is 4.
<result>B</result>
Two concentric circles form a ring. The inner and outer circumferences of ring are (352/7) m and (518/7) m respectively. Find the width of the ring.