Question

the total surface area of a cone of radius r÷2 and length 2l is​

Answer 1

Answer:

$\frac{\pi4lr + {r}^{2} }{4}$

Step-by-step explanation:

Refer to the attachment...

Answer 2

Answer:

Step-by-step explanation:

Total surface area =πr(r+l)

=22/7×r/2(r/2+2l)

=22r/14(r/2+4l/2)

=22r^2/7+88rl/7

=(22r^2+88rl)/7