Question

curved surface area of a cone is 308cm² and its slant height is 14 cm find .

(i) radius of the base
(ii) total surface area of the cone.

I want (i) solution also ​

Answer 1

Answer:

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Curved surface area of a cone. is 308 cm

2

its slant height is 14 cm. Find

(i) radius of the base and

(ii) total surface area of the cone.

Medium

Solution

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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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Answer 2

Answer:

Curved surface area of a right circular cone of base radius, r and slant height, l is πrl. Thus, radius of the cone is 7 cm and total surface area of the cone is 462 cm².

Step-by-step explanation:

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