1.

4. The base diameter and height of a cone is \( 12 cm \) and \( 8 cm \), then find the curved surface area of the cone.

Answer»
Given:
   d=12, r=6cm 
   h=8cm 
We know that, CSA of cone= πrl
l²= r²+ h²
l²= 6² + 8²=10²,  l=10cm
Therefore, CSA= 22/7 × 6 × 10= 188.57 cm²
Given,
The diameter of the cone is 12cm
So the radius will be 12/2 = 6cm
Height of the cone is 8cm

C. S. A of cone=  π r l
Now, we have to find l
So l²= r²+h²
L²=6²+8²
=36+64
=100
L=10

22/7 X 6 X 10
1320/7
188.571



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