Question
The ratio of the outer and he inner perimeters of a circular path is 23 : 22 . If the path is 5 metres wide , the diameter of the inner circle is :
Answer: Option C
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`(2 pi R_1) / (2 pi R_2) = 23/22`
`hArr R_1/R_2 = 23/22`
`hArr R_1 = 23/22 R_2`
Also ,` R_1 - R_2 = 5 m.`
`hArr (23 R_2)/(22) - R_2 = 5`
`hArr R_2 = 110`
`:.` Diameter of inner circle = (2 x 110) m = 220 m.Was this answer helpful ?
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