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A rectangular piece is 20m and 15m wide....

A rectangular piece is 20m and 15m wide. From its four corners, quadrants of radii 3.5m have been cut. Find the area of the remaining part.

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  13. A regular hexagon is inscribed the circle. If the area of hexagon i...

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  14. A path of width 3.5 m runs around a semi-circular grassy plot whose...

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