9 identical 7-cm cubes are placed in an empty rectangular container of length 88 cm and width 29 cm. The container is then filled with water from a tap flowing at a rate of 7 litres per minute. It takes 11 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
= 7 x 7 x 7
= 343 cm³ 

Volume of 9 cubes
= 9 x 343
= 3087 cm³ 

1 ℓ = 1000 mℓ
7 ℓ = 7000 mℓ

Volume of water in the container
= 11 x 7000
= 77000 mℓ

Volume of ¹₂ of the container
= 77000 + 3087
= 80087 mℓ

Volume of the container
= 80087 ÷ ¹₂
= 80087 x ²₁
= 160174 mℓ

Base area
= 88 x 29
= 2552 cm² 

Height of the container
= 160174 ÷ 2552
≈ 62.8 cm

Answer(s): 62.8 cm