Question

Find the total surface area of a cone
radius r/4 and length 4.​

Answer 1

Total Surface Area

= $πrl + πr²$

= $(π × \frac {r}{4} × 4) + (π × \frac{r}{4} × \frac{r}{4})$

= $(π × r) + (π × \frac{r²}{16})$