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1. The volume of a cylindrical vessel is 27720 cu. cm and its base radius is 21 cm. Find the curvedsurface area of the cylindrical vessel.

Answer»

Volume = pi*r*r*h=> h = 27720/[21*21*(22/7)]=> h = 20 cm.

Curved Surface Area = 2*r*pi*h= 2*21*(22/7)*20= 2640 sq cm



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