The L.S.A of a right circular cone of height 15 cm and base diameter 16cm is

$r=8\text{cm}$

$\text{h}=15\text{cm}$

L.S.A of cone $=\pi rl$

$=\pi \left(8\right)\sqrt{r^2+h^2}$

$=\pi \left(8\right)\sqrt{64+225}$

$=\pi \left(8\right)17$

$=136\pi$