From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid to the nearest cm^2. Why should we add the csa of cone why we can not subtract the Csa of cone
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Step-by-step this is because when we take out the surface area of cone then its surface area includes the area of its curved surface and the upper to tops and when we take out in a cone from it then its surface is increased Oliver feel that it is the difference is mass is decreased but it services increase with two slant height that's why we have to add it:
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