Question

Find the total surface area of cone whose diameter of the base is 14m and slant height is 25 meter.​

Answer 1

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Answer 2

${ \huge{ \underline{ \underline{ \sf{ \green{GivEn : }}}}}}$

• Diameter of the base is = 14 m

• Slant height is = 25 m

${ \huge{ \underline{ \underline{ \sf{ \green{To \: find :}}}}}}$

• What's the total surface area of the given cone?

Formula to be used :-

• Radius = Diameter /2

• TSA of cone = πr ( r + l)

Where,

r = Radius

l = Slant height

${ \huge{ \underline{ \underline{ \sf{ \green{SoluTion : }}}}}}$

Given that,

Diameter = 14 m

We know,

Radius = Diameter /2

⟼ Radius = 14 /2

⟼ Radius = 7 m

____________________________________________

Now, TSA of cone

= πr ( r + l)

= 3.1416 × 7 ( 7 + 25)

= 704 m²

_____________________________________________

Hence,

the total surface area of the cone is 704 m² .