the diameter and height of a conical cap are 12cm and 21cm respectively find the area of the paper required to make the cap
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the diameter of conical cap I'd 12cm
therefore r=6cm
h=21cm .......given
hence, l²=r²+h²
l²= 36+441
l²= 477
l=3√53
the paper required to make the cap
=πrl
=3.14×6×3√53
=3.14×18√53
=68.58cm²
therefore, the area of paper required to make the conical cap is 68.58cm²
therefore r=6cm
h=21cm .......given
hence, l²=r²+h²
l²= 36+441
l²= 477
l=3√53
the paper required to make the cap
=πrl
=3.14×6×3√53
=3.14×18√53
=68.58cm²
therefore, the area of paper required to make the conical cap is 68.58cm²
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