(a(i))[3]
Calculate the volume occupied by the water in the tank. Give your answer correct to the nearest $10\,\text{cm}^3$.
(a(ii))[5]
Calculate the volume of water now remaining in the tank.
(b)[3]
Calculate the mass of the stone in grams.
(c)[4]
Calculate the angle formed by $AG$ with the base of the cuboid.