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Length of the sheet=Circumference of the base.
⇒44=2πr
⇒r=44×21×227=7
∴ Radius=7cm
Breadth of the metal sheet=height of the cylinder
h=20cm
Curved surface area=2πrh
=2×722×7×20=880sq.cm
∴ Curved surface area is 880sq.cm
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