1. A container is made from a cylinder and a cone, each of radius 5 cm.
The height of the cylinder is 12 cm and the height of the cone is 4.8 cm.

The cylinder is filled completely with water.
The container is turned upside down as shown below.

Calculate the depth, $d$, of the water.
[The volume, $V$, of a cone with radius $r$ and height $h$ is $V=\frac{1}{3} \pi {r}^{2}h$.]

$d$ = ............................................. cm