Question

The base radius and height of a cone
are
9 cm and 12am.
a) What is its slant height
b) what is the curved surface area.​

Answer 1

Answer:

R.E.F image

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

Answer 2

Step-by-step explanation:

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