The area of the curved surface of a cone is 60 π cm2. If the slant he

1.	The area of the curved surface of a cone is 60 π cm2. If the slant height of the cone be 8 cm, find the radius of the base.
Answer» Curved surface area(C.S.A)= 60 π cm² Slant height of the cone(l) = 8 cm We know, Curved surface area(C.S.A) = πrl ⇒ πrl = 60 π ⇒ r x 8 = 60 or r = 60/8 = 7.5 Therefore, radius of the base of the cone is 7.5 cm.

The area of the curved surface of a cone is 60 π cm2. If the slant height of the cone be 8 cm, find the radius of the base.

Answer»

Curved surface area(C.S.A)= 60 π cm²

Slant height of the cone(l) = 8 cm

We know,

Curved surface area(C.S.A) = πrl

⇒ πrl = 60 π

⇒ r x 8 = 60

or r = 60/8

= 7.5

Therefore, radius of the base of the cone is 7.5 cm.