Question

A right angle cylinder just encloses a sphere if the height of cylinder is 21cm then find the curved surface area of cylinder

Answer 1

The curved surface area of the cylinder is 2079 cm²

Step-by-step explanation:

Given data:

Height of the cylinder =  21 cm

Diameter of the cylinder = 21 cm

the radius of the cylinder = d /2 =  10.5 cm

Now ,

Surface area of the cylinder  =2πr(r+h)

                                               =2×22/7×105/10(10.5+21)

                                               =2079 cm²

Thus the curved surface area of the cylinder is 2079 cm²

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