Question

Radius of a cone is 7 cm and its height is 24cm, find its surface area?​

Answer 1

$\large\red\star\sf \pink {\underline{ \: Solution :- }}$

Given: R = 7cm,

H = 24cm

➞ l² = r²+h²

➞ l² = 7²+24²

➞ l² = 49+576

➞ l² = 625

➞ l = √625

➞ l = 25

CSA of cone = 22/7×7×25

                    ➞22×25

                    ➞ 550

∴The CSA of cone is 550 cm²

Answer 2

Hello mate...

Solution:

Given:

Radius = 7cm.

Radius = 7cm.Height = 24 cm.

TO FIND:

The surface area of the cone.

SOLUTION

$\bold{ \implies3.14 \times 7 (r + \sqrt{ {24}^{2} + {7}^{2} }) } \\ \bold{ \implies 21.9(7 + \sqrt{576 + 49}) } \\ \bold{ \implies 21.9(7 + 25.5)} \\ \bold{\implies 21.9(32.5)} \\ \bold{ \implies 558.4}$

Therefore, the surface area of the cone = 558.8 cm².

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HOPE THIS HELPS YOU...