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
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Answered by
2
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
Answered by
0
Answer:
339.12 cu . cm
Step-by-step explanation:
curved surface area of cone = π× r×l
= 3.14 × 9 ×12
=314/100×9×12
= 314/100×108
= 339.12 cu . cm
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