(a(i))[4]
Show that the volume of the solid is $692\text{ cm}^3$, correct to the nearest cubic centimetre. [The volume, $V$, of a sphere with radius $r$ is $V = \frac{4}{3}\pi r^3$]
(a(ii))[4]
Calculate the total mass of this silver solid.
(b(i))[2]
Calculate the length of the arc of this sector. Give your answer as a multiple of $\pi$.
(b(ii))[4]
A cone is formed from this sector by joining OA to OB. Calculate the volume of the cone. [The volume, $V$, of a cone with radius $r$ and height $h$ is $V = \frac{1}{3}\pi r^2 h$]