Question

LE
The radius of a cone is equal to the radius of a
cylinder. If the slant height of the cone is equal
to the height of the cylinder and the height of
the cone is equal to its radius, then find the
ratio of the total surface area of the cylinder to
the curved surface area of the cone.​

Answer 1

Answer:

Let the radius of the cone and cylinder be r.

The base radii of cone and cylinder are equal.

Given curved surface areas are equal,

∴(π)rl=2(π)rh

∴

h

l

=2

Hence, option A is correct.