Question

How do you do this? I need some helps please

Answer 1

Well for an explanation you want to find the volume of the cone and the cylinder then just add them together

Answer 2

Well, as already pointed out, you add the volumes of both, the cylinder and the cone

notice the picture below

so.. now, we know the height of the cone, is about 7.26

thus  $\bf \textit{volume of a cylinder}\\\\ V=\pi r^2 h\qquad \begin{cases} r=radius\\ h=height\\ -------\\ r=1\\ h=12.07 \end{cases}\implies V=\pi (1)^2 \cdot 12.07 \\\\\\ \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}\qquad \begin{cases} r=radius\\ h=height\\ -------\\ r=9.3\\ h\approx 7.26 \end{cases}\implies V=\cfrac{\pi (9.3)^2\cdot 7.26}{3}$