(a)[3]
A cuboid has dimensions $6.2$ cm by $4.8$ cm by $2.5$ cm. Each dimension is stated correct to the nearest millimetre. Calculate the upper bound of the cuboid's surface area.
(b(i))[4]
Show that the base has length $12$ cm.
(b(ii))[2]
Calculate the pyramid's volume.
(b(iii))[3]
Calculate the angle $CBE$.