(a)[3]
Calculate the value of $x$.
(b(i))[2]
Show that the height of the cylinder is $30\,$cm.
(b(ii))[4]
Calculate the volume of the cylinder as a percentage of the volume of the sphere. The volume, $V$, of a sphere with radius $r$ is $V = \frac{4}{3}\pi r^3$.
(c)[3]
Calculate the new depth of water in the cube. The volume, $V$, of a sphere with radius $r$ is $V = \frac{4}{3}\pi r^3$.