Question
The diameter of the base of a cylindrical vessel is 30
cm and its height is 56 cm. Find its curved surface area (in cm²).Solution
Curved surface area = 2 πrh Given Diameter = 30 cm, so radius r = 15 cm Height h = 56 cm Substitute these values: CSA = 2 × 15 × 56 π CSA =1680 π Approximating π as 22/7 CSA= 1680 × 22/7  =240×22=5280cm²
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