if the ratio of the radius of the slant height of a cone is 3:2& its csa is 308 cm square find the radius of cone
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Answer:
Answer
Given :
Curved surface area of the cone =308cm
2
and Slant height or l=14 cm.
Curved surface area of the cone =πrl
308=
7
22
×r×14
r=
(22×14)
(308×7)
r=7cm
Total surface area of the cone =πr(r+l)
=(
7
22
×7)(7+14)
=22×21
Total surface area of the cone =462cm
2
So, the radius of the base of the cone is 7 cm and the total surface area of the cone is 462cm
2
.
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