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A cylindrical roller rolls over a square field. It takes 400 rounds to cover the complete field. If the radius of the cylindrical roller is…

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A cylindrical roller rolls over a square field. It takes 400 rounds to cover the complete field. If the radius of the cylindrical roller is 0.7 meter and length is 8.4 m then find out the side of square (approximately). Take π = 22/7

A135 m
B145 m
C122 m
D150 m

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Discussion 1

CCommunity05 Jun 2019

Area covered by the cylinder in total,

⇒ 2 × π × 0.7 × 8.4 × 400

⇒ 14784 m2

∴ Area of the square field = 14784 m2

∴ Side of the square

⇒ √14784 = 121.59 m

⇒ 121.59 m ≈ 122 m