Question

derivation formula for curved surface.​

Answer 1

Answer:

CSA of the frustum of a cone = πl( r1 + r2). where r1 = radius of the larger circular face of the frustum, r2 = radius of the smaller circular face of the frustum, and l = slant height of the frustum. l = h 2 + ( r 1 - r 2 ) 2 and h is the height of the frustum.

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Answer 2

Answer:

The answer must be π[r1+r2l+r12+r22]