8 identical 9-cm cubes are placed in an empty rectangular tank of length 88 cm and width 29 cm. The tank is then filled with water from a tap flowing at a rate of 8 litres per minute. It takes 12 minutes to fill up ³₅ of the tank. What is the height of the tank? Correct your answer to 1 decimal place.
Volume of 1 cube
= 9 x 9 x 9
= 729 cm³ 

Volume of 8 cubes
= 8 x 729
= 5832 cm³ 

1 ℓ = 1000 mℓ
8 ℓ = 8000 mℓ

Volume of water in the tank
= 12 x 8000
= 96000 mℓ

Volume of ³₅ of the tank
= 96000 + 5832
= 101832 mℓ

Volume of the tank
= 101832 ÷ ³₅
= 101832 x ⁵₃
= 169720 mℓ

Base area
= 88 x 29
= 2552 cm² 

Height of the tank
= 169720 ÷ 2552
≈ 66.5 cm

Answer(s): 66.5 cm