The area of the curved surface of a cone of radius 2r and slant height `l/2` is a) `pirl` b)`2pirl` c)`1/2 pir l` d)`pi(r+l)r`

The total surface area of a cone whose radius is (r)/(2) and slant height 2l is

The total surface area of a cone of radius r/2 and length 2l , is a) 2pir(l+r) b) pir(l+r/4) c) pir(l+r) d) 2pirl

The area of the curved surface of a cone is 60pi\ c m^2dot If the slant height of the cone be 8cm, find the radius of the base.

The total surface area of a hemisphere of radius r is pir^2 (b) 2pir^2 (c) 3pir^2 (d) 4pir^2

The radius of a cone 7cm and area of curved surface is 176\ c m^2 . Find the slant height.

The base radius and total surface area of a cone are 7 cm and 704 cm^(2) . Find its slant height.

The total surface area of frustum shaped glass tumbler is (r_1 gt r_2) (a) pi r_1 l + pi r_2 l (b) pi l (r_1 + r_2) + pi (r_2)^2 (c) 1/3 pi h ( (r_1)^2 + (r_2)^2 + r_1r_2 ) (d) sqrt (h^2 + (r_1 - r_2)^2)

The total surface area of frustum shaped glass tumbler is (r_1 gt r_2) (a) pi r_1 l + pi r_2 l (b) pi l (r_1 + r_2) + pi (r_2)^2 (c) 1/3 pi h ( (r_1)^2 + (r_2)^2 + r_1r_2 ) (d) sqrt (h^2 + (r_1 - r_2)^2)

State True or False and justify your answer A solid cone of radius r and height h is placed over a solid cylinder having same base radius and height as that of a cone,. The total surface area of the combined solid is pi [sqrt(r^(2) + h^(2)) +3r +2h]

A solid sphere of radius r is melted and cast into the shape of a solid cone of height r , the radius of the base of the cone is (a) 2r (b) 3r (c) r (d) 4r