Question

the curved surface area of a cone with Base radius 40 cm is 1640 π sq cm . find the slant height of the cone.

Answer 1

curved surface of cone=1640π
πrl=1640π
40*l=1640
l=1640/40
l=41

Answer 2

Answer:

The slant height of cone is 41 cm

Step-by-step explanation:

Given,

radius = 40  cm

Curved surface area = 1640 π

slant height = ?

We know,

Curved Surface Area = π r l

where,

r is radius

l is slant height

Substituting the values ,

1640 π = π * 40 * l

1640 π  / π * 40 = l

l = 41 cm

Hence,

The slant height of cone is 41 cm