A cylinder has radius 4.2 cm and height 30cm find the surface area of cylinder if it is closed at one end.
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Radius - 4.2cm
Height - 30cm
Surface area - CSA+area of 1 closed
side.
= 2πrh+ πr^2
= πr(2h+r)
= 3.14× 4.2(2×30+4.2)
= 847.44 cm^2 ans.
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