4 identical 7-cm cubes are placed in an empty rectangular container of length 70 cm and width 22 cm. The container is then filled with water from a tap flowing at a rate of 9 litres per minute. It takes 8 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
= 7 x 7 x 7
= 343 cm³ 

Volume of 4 cubes
= 4 x 343
= 1372 cm³ 

1 ℓ = 1000 mℓ
9 ℓ = 9000 mℓ

Volume of water in the container
= 8 x 9000
= 72000 mℓ

Volume of ¹₅ of the container
= 72000 + 1372
= 73372 mℓ

Volume of the container
= 73372 ÷ ¹₅
= 73372 x ⁵₁
= 366860 mℓ

Base area
= 70 x 22
= 1540 cm² 

Height of the container
= 366860 ÷ 1540
≈ 238.2 cm

Answer(s): 238.2 cm