Question

6. The total surface area of a cone, whose
generator is equal to the radius R of its base, is S.
If A is the area of a circle of radius 2R, then which
one of the following is correct?
(a) A=S
(b) A = 25
(c) A =
(d) A = 45 hp​

Answer 1

t s a of cone

πrl+πr×πr.

r=2(given)