Question

Radius of a Cone is 9m and its height is 12m then find its C.S.A and volums​

Answer 1

Answer:

We know that the radius of cone r=7cm

and its height h=9cm

and the slant height of second cone =t cm

Then, according to the question.

Numerically: The lateral surface of second cone = volume of the first cone

πrl=

3

1

πr

2

h

π×7×l=

3

1

π×7

2

×9

1=

3

1

×

7

7×3×9

=21

Thus the required slant height slant height of the second cone =21cm

Answer 2

Answer:

424.3 , 1018.3

Step-by-step explanation:

csa = πrl

r = 9

h = 12

l²=r²+h²

hence l= 15

CSA= 22/7 * 9 * 15

= 424.3cm²

volume = 1/3πr²h

= 1/3 * 22/7 * 9 * 9 * 12

= 1018.3cm³

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