Question

the slaint height of the cone is 10 cm and radius of base is 7cm find the surface area of the cone​

Answer 1

ANSWER :

›»› The surface area of cone is 220 cm².

GIVEN :

• The slant height of the cone is 10 cm and radius of base is 7cm.

TO FIND :

• The surface area of the cone.

SOLUTION :

To find the Area of surface area of cone, we use the formula:-

❰ CSA of cone = πrl ❱

• Slant height of cone (l) = 10 cm.
• Radius of cone (r) = 7 cm.

According to given question,

On putting the given values in the formula, we get

⟶ CSA of cone = 22/7 * 7 * 10

⟶ CSA of cone = 22 * 1 * 10

⟶ CSA of cone = 22 * 10

⟶ CSA of cone = 220

Hence, the surface area of cone is 220 cm².

Extra Brainly Knowledge :

• C.S.A of Cone = πrl
• T.S.A of Cone = πr(l + r)
• Volume of Cone = 1/3 πr²h

Where,

• The value of π is 22/7 or 3.14.
• r is the Radius of cone.
• l is the Slant height of cone.
• h is the Height of cone

Diagram of cone :

$\setlength{\unitlength}{1.2mm}\begin{picture}(5,5)\thicklines\put(0,0){\qbezier(1,0)(12,3)(24,0)\qbezier(1,0)(-2,-1)(1,-2)\qbezier(24,0)(27,-1)(24,-2)\qbezier(1,-2)(12,-5)(24,-2)}\put(-0.5,-1){\line(1,2){13}}\put(25.5,-1){\line(-1,2){13}}\multiput(12.5,-1)(2,0){7}{\line(1,0){1}}\multiput(12.5,-1)(0,4){7}{\line(0,1){2}}\put(18,1.6){\bf{r}}\put(9.5,10){\bf{h}}\end{picture}$

Answer 2

$\huge \purple A \purple N \purple s \purple W \purple e \purple \R :-$

Curved Surface Area of the cone

=> πrl

=> 22/7 × 7 × 10

=> 22 × 10

=> 220 cm^2

Hence , Surface Area of cone is 220 cm^2