Question

1. A cone has a circular base of radius 10 cm and a
slant height of 30 cm. Calculate the surface area.
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Answer 1

Step-by-step explanation:

Given;

Radius of a cone(r) = 10 cm

Slant height of cone (1)= 30 cm

Total surface of cone = Tr(l+r)

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

Total surface of cone =3.14 x10(40)

Total surface of cone =3.14 x 400

Total surface of cone =1256 cm?

Hence, the Total surface of cone =1256 cm?