Question

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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 it ???

Answer 1

Answer:

Step-by-step explanation:

This is because of name when we are finding out the total surface area of the cylinder then we find out its upper portion only including the base and A4 was not the inner how much capacity it contain not that one and when we insert cone is it or just when we take out cone from it then its surface increase Although we feel that it is decrease some amount of ITR removed but its surface is increased with two slant height that's why we have to add it