1.

The height of a cone is 12 cm and the radius of its base is 9 cm find the Csa of cone take π 3.14 ​

Answer»

ANSWER: the csa of cone will be 423.9 cm^2

Step-by-step explanation:

The formula of CURVED SURFACE area is πrl where l is the SLANT lenght.

l =( 12^2 + 9^2)^1/2

= (225)^1/2 = 15.

Thus the csa will be 3.14 *9*15 = 423.9 cm^2



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