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
Share
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
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
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
.