Question

The height of a cone is 12 cm and its base radius is 5 cm. Find the curvedsurface area of the cone. (Take pi = 3.14)
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Answer 1

Answer:

OA=16cm,AB=l

l=

16

2

+12

2

=

256+144

l=20cm

curved surface Area,

C.S.A=πrl=3.14×12×20=753.6cm

2

Total surface Area,

T.S.A=πr(r+l)=3.14×12[12+20]=1205.76cm

2