Question

A cone has a circular base of radius 10cm and slant height of 30cm .calculate the surface area ​

Answer 1

Answer:

Given;

Radius of a cone(r) = 10 cm

Slant height of cone ( l)= 30 cm

Total surface of cone = πr(l+r)

Total surface of cone = (22/7)× 10(30+10)

Total surface of cone =3.14 ×10(40)

Total surface of cone =3.14 × 400

Total surface of cone =1256 cm²

Hence, the Total surface of cone =1256 cm²

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Hope this will help you....

Answer 2

Step-by-step explanation:

Given,

radius, r = 10 cm slant height, I = 30 cm

Now,

surface area of conе= πr (r+l)

= 3.14 x 10 (10 + 30 )

= 31.4 x 40

= 1256

So the surface area of the cone is 1256 cm sq.