A park square in shape has a 3 metre wide road inside it running along is sides . The area occupied by the road is 1764 square metres. What is the perimeter along he outer edge of the road ?
Let the length of the outer edge be `x` metres.
Then length of the inner edge = `(x - 6)` m
`:.` `s^2 - (x - 6)^2` = 1764
`hArr x^2 - (x^2 - 12x + 36) 1764`
`hArr 12x = 1800`
`hArr x = 150`
`:.` Required perimeter = `(4x) `m = (4 x 150) m = 600 m.
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