A sector is cut off from a circle radius 8.2cm to form a cone, if the radius of the resulting cone is 3.5cm, calculate the curved surface area of the cone. [take π = 22/7]

U_Martins1

11 years ago

Curved surface area of cone = pi*r*l (note: l is the radius of the initial sector)



22/7 * 3.5 * 8.2 = 90.2

dorcas22

9 years ago

Here is an explanation:

curved surface area of a cone = pirl

mathematics 604

pi=22/7

r=3.5

l=8.2

...22/7*3.5*8.2

=90.2cm

Chemisurlar

9 years ago

pls whats d formular for curved surface area of a cone