Question

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

is :

(A) 2tr (1 + r)
(B) 2tr
2"
(C) 2 (1 + 4r)
(D) ter (I + 4r)​

Answer 1

Answer:

total surface area of a cone is πrl+πr²

πr(l+r)

22/7* 2r( l/2+2r)