Question

The curved surface area of a cone is 4070 and diameter is 70 what is slant height

Answer 1

Given: Diameter of base of cone = 70 cm

Let the slant height of the cone be l cm

Now curved surface area = 4070 cm2
 
Hence slant height of the given cone is 37 cm

Answer 2

diameter = 70 unit
radius = 35 unit
curved surface area of given cone = 4070unit²
πrl = 4070unit²
(22/7)×35×l = 4070unit²
22×5×l=4070
l=4070/(22×5)
l=37 unit