(a)[2]
Calculate the height of the water in the tank.
(b(i))[3]
Calculate the volume of the tank.
(b(ii))[1]
Write your answer to part (b)(i) in litres.
(c)[3]
Calculate the time taken. Give your answer in hours and minutes.
(d(i))[2]
Using the properties of similar triangles, show that $h = 2(x - 50)$.
(d(ii))[1]
Using $h = 2(x - 50)$, show that the shaded area, in $\text{cm}^2$, is $x^2 - 2500$.
(d(iii))[2]
Find the value of $x$.
(d(iv))[1]
Find the value of $h$.