Question
A circular park has a path of uniform width around it . The difference between outer and inner circumferences of the circular path is 132 m . Its width is :
Answer: Option B
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`2 pi R_1 - 2 pi R_2 = 132`
`hArr 2 pi (R_1 - R_2) = 132`
`hArr (R_1 - R_2) = ((132)/(2 xx 22) xx 7) = 21 m`
`:.` Required width = 21 m.
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