Question

r = 5cm h=12 cm find total surface area of a cone and volume of a cone

Answer 1

r=5cm h=12cm.
As we know,

$l = \sqrt{r2 + h2}$
therefore, l = 13cm
so, TSA of cone=
$\pi \times r(l + r)$
3.14×5(13+5)
=282.74.
Now, volume of cone=
$\frac{1}{3} \pi \times r {}^{2} \times h$
1/3×3.14×5^2×12
=314.15