Question

Can anyone help me to find the answer..... please...​

Answer 1

Answer:

Curved Surface Area of Cone =

$\pi \: rl$

$\pi \times (r \div 2) \times 2rl$

$answer \: = \pi \: rl$

Answer 2

Total surface area of cone = π r ( r + l )

Given data,

radius of cone= r/2

slant height = 2l

Therefore, total surface area of cone =π r/2 (r/2 + 2l)

= π( r^2 / 4 + rl )

=π r ( l + r/4 )