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Height of Cylinder = 1m = 100 cm
Diameter of Cylinder = 140 cm
Radius of Cylinder = 140/2 = 70 cm
TSA of Cylinder :
2πrh + 2πr²
2πr [ h + r ]
= 2 × 22/7 × 70 [ 100 + 70 ]
= 2 × 22 × 10 × 170
= 440 × 170
= 74800 cm²
= 748 m²
Hence
The metal sheet of 748 cm² is required for the Cylinder.
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