the base of a cone with radius 5 cm and height of 12 cm is hemispherical find the total surface area of the article (π=3.14)
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Answer:
he curved surface area of a cone is πrl, where r is the radius and l is slant height
We need to calculate slant height, it can be done by using the formula l 2 =r 2 +h 2 , where h is height.
So, l = r 2 +h 2 = 5 2 +12 2 =13
We have curved surface area of a cone is πrl =π×5×13 =65π cm ^2
Hence, the answer is 65π cm ^2
Step-by-step explanation:
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