9 identical 2-cm cubes are placed in an empty rectangular container of length 72 cm and width 26 cm. The container is then filled with water from a tap flowing at a rate of 9 litres per minute. It takes 9 minutes to fill up ¹₂ of the container. What is the height of the container? Correct your answer to 1 decimal place.
Volume of 1 cube
= 2 x 2 x 2
= 8 cm³ 

Volume of 9 cubes
= 9 x 8
= 72 cm³ 

1 ℓ = 1000 mℓ
9 ℓ = 9000 mℓ

Volume of water in the container
= 9 x 9000
= 81000 mℓ

Volume of ¹₂ of the container
= 81000 + 72
= 81072 mℓ

Volume of the container
= 81072 ÷ ¹₂
= 81072 x ²₁
= 162144 mℓ

Base area
= 72 x 26
= 1872 cm² 

Height of the container
= 162144 ÷ 1872
≈ 86.6 cm

Answer(s): 86.6 cm