a conical hole is drilled in a circular cylinder of height 12cm and radius 5cm, which has same height and same base radius. find the T.S.A after drilling of cone
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first find out the CSA of cylinder (2πrh)and area of its base πrsquare, then CSA of cone (πrl) and add all these area then u will get answer,
use same radius ,for case
in case of CSA first find l =√r square+ h square
first find out the CSA of cylinder (2πrh)and area of its base πrsquare, then CSA of cone (πrl) and add all these area then u will get answer,
use same radius ,for case
in case of CSA first find l =√r square+ h square
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