Two concentric circles from a ring . he inner and outer circumferences of he ring are `50 2/7` m and `75 3/7` m respectively . Find he width of the ring
Let he inner and outer radii be r and R metres.
Then , 2` pi r` = `352/7`
`rArr r = (352/7 xx 7/22 xx 1/2)` = 8 m.
`2 pi r = 528/7`
`rArr R = (528/7 xx 7/22 xx 1/2)` = 12 m.
`:.` width of the ring = (R - r) = (12 - 8) m = 4 m.
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