4 identical 3-cm cubes are placed in an empty rectangular container of length 86 cm and width 28 cm. The container is then filled with water from a tap flowing at a rate of 9 litres per minute. It takes 12 minutes to fill up ¹₅ of the container. What is the height of the container? Correct your answer to 1 decimal place.
Volume of 1 cube
= 3 x 3 x 3
= 27 cm³ 

Volume of 4 cubes
= 4 x 27
= 108 cm³ 

1 ℓ = 1000 mℓ
9 ℓ = 9000 mℓ

Volume of water in the container
= 12 x 9000
= 108000 mℓ

Volume of ¹₅ of the container
= 108000 + 108
= 108108 mℓ

Volume of the container
= 108108 ÷ ¹₅
= 108108 x ⁵₁
= 540540 mℓ

Base area
= 86 x 28
= 2408 cm² 

Height of the container
= 540540 ÷ 2408
≈ 224.5 cm

Answer(s): 224.5 cm