(a(i))[3]
Calculate the volume of the vase. State the units for your answer.
(a(ii))[2]
Calculate the vase’s surface area.
(b)[2]
Make $h$ the subject of $A = 2\pi r h + \pi r^2$.
(c)[2]
Factorise $2\pi r h + \pi r^2$ completely.
(d(i))[2]
For this vase and the vase in part (a), the radius ratio is $4 : 6$ and the height ratio is $15 : 22.5$. Write these ratios in simplest form.
(d(ii))[1]
State the mathematical word needed to finish the statement. The ratios show that the two vases are ____________________.