Question

2.The height of a cone is 16 cm and its base radius is 12 cm. Find: (i) the curved surface area, (ii) total surface area of the cone (pai = 3.14)

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Answer 1

Answer:

(i) CSA of cone=753cm^2

(ii)TSA of cone=1205.76cm^2

Step-by-step explanation:

r=12cm

h=16cm

$l=\sqrt{h^{2} +r^{2}}$

  =$\sqrt{16^{2}+12^{2} }$

  =$\sqrt{256+144}$

  =$\sqrt{400}$

  =20cm

l=20cm

$\pi =3.14$

(i) CSA of cone=$\pi rl$

                        =3.14*12*20

                        =753$cm^{2}$

(ii)TSA of cone=$\pi r(l+r)$

                      =3.14*12*(20+12)

                      =3.14*12*32

                      =1205.76$cm^{2}$

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