Question

curved surface area of a cone is 251.2 CMsqure and radius of its base is 8 cm. find its slant height and perpendicular height. (π=3.14)

Answer 1

curved surface area = slant height * base radius * π
Let x cm be the slant height
x * 8 * 3.14= 251.2
x= 10
The slant height = 10cm

Let a cm be the perpendicular height
Using Pythagoras Theorem,
8^2 + a^2 = 10^2
a = 6
The perpendicular height = 6 cm