Question

1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved
surface area.​

Answer 1

Answer:

I have mentioned the answer in the pic..

hope it helps..

Answer 2

$\sf{\huge{\underline{\green{Given :-}}}}$

• Diameter of the base of a cone is 10.5 cm.

• The slant height is 10 cm.

$\sf{\huge{\underline{\green{To\:Find :-}}}}$

• The curved surface area of cone .

$\sf{\huge{\underline{\green{Answer :-}}}}$

According to the question,

The Diameter of the base of a cone is 10.5 cm.

So its radius will be d/2.

➝ 10.5 / 2

➝ 5.25 cm

• The slant height is 10 cm.

So by this we know ,

• r = 5.25 cm

• l = 10 cm

The curved surface area of cone = π r l

➝ 3.14 × 5.25 × 10

➝ 16.485 × 10

➝ 164.85 cm

≈ 165 cm

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