An open metallic bucket is the shape of a frustum of a cone mounted on a hollow cuylinderical base made of the same metallic sheet . The surface area of the metallic sheet used is equal to curved surface area of frustum of a cone + area of circular base + curved surface area of cylinder.

Explanation

True
Because the resulting figure is

Henc, ABCD is a frustum of a cone and CDEF is a hollow cylinder.