Figure U shows a closed rectangular tank of dimensions 44 cm by 44 cm by 75 cm with a cube of edge 24 cm glued to its bottom right corner. The tank contains 75 litres of water. Figure V shows the same rectangular tank lying on its side. Find the height of the water level, in centimetres, corrected to 2 decimal places.
Height of water under the cube in Figure V 
= 44 - 24
= 20 cm

Volume of water under the cube in Figure V 
= 75 x 44 x 20
= 66000 cm³ 

1 ℓ = 1000 
75 ℓ = 75000cm³ 

Volume of water beside the cube
= 75000 - 66000
= 9000 cm³ 

Base area of water beside the cube
= (44 x 75) - (24 x 24)
= 3300 - 576
= 2724 cm² 

Height of water level beside the cube
= 9000 ÷ 2724
≈ 3.30 cm

Height of the water level
= 3.30 + 24
≈ 27.3 cm

Answer(s): 27.3 cm