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

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

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

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 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 hemisphere of radius r is pir^2 (b) 2pir^2 (c) 3pir^2 (d) 4pir^2

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

A cylinder with radius r\ and height h is closed on the top and bottom. Which of the following expressions represents the total surface area of this cylinder? (a) 2pir\ (r+h) (b) pir\ (r+2h) (c) pir\ (2r+h) (d) 2pir^2+h

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)