What is the formula of CSA of frustum?
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Step-by-step explanation:
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.
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CSA of frustum of cone = πl(r1+r2)
where l = √h^2 + ( r1-r2)^2
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