Question

in a cone d=14cm, l=10cm then csa​

Answer 1

$\large{\underline{\red{\rm{AnswEr:220\:cm^2}}}}$

$\bold\green{\underline{Correct\: Question:}}$

The diameter of a cone is 14 cm and its slant height is 10 cm. Find the area of its curved surface.

$\huge\bold\purple{\underline{Solution:}}$

$\bold\green{\underline{Given;}}$

The diameter of cone=14cm

The slant height of cone=10cm

$\bold\orange{\underline{Find:C.S.A\:of\:cone;}}$

$\bold\green{\underline{A.T.Q}}$

If diameter of cone=14cm

•°•Radius of cone=14/2=7cm

Using formula for C.S.A of cone

$\bold\purple{\boxed{C.S.A=\pi\:r\:l}}$

⟹C.S.A=22/7×7×10

⟹C.S.A=22×10

⟹C.S.A=220cm²

Hence,

The C.S.A of cone is 220 cm²

Answer 2

${\blue{\underline{\underline{\large{\mathtt{Answer:}}}}}}$

Given:

• We have been given that the diameter of cone is 14cm and its slant height is 10cm.

To Find:

• We need to find the Curved surface area of the cone.

Solution:

As the diameter of the cone is given as 10cm, therefore the radius of cone is 14/2 = 7cm.

We know that the curved surface area of the cone is πrl.

Now, substituting the values, we have

Curved surface area = 22/7 × 7 × 10

= 22 × 10

= 220cm²

Hence, the curved surface area of cone is 220cm².