Question

Find the total surface area of a cone whose radius is r/2 and slant height is 2l.

Answer 1

Use this formula.... πrl+πr^2

Answer 2

Answer:

T. S. A of cone =πr(r+1)

put, value =πr/2(r/2+21)

=πr/2(r+41) /2

=(πr^2+4πr1) /4

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