An empty rectangular container has a capacity of 63 ℓ and a height of 35 cm. At 8 a.m., Tap Y is turned on to fill the container at a rate of 7 ℓ per minute for 18 minutes. After 13 minutes, Tap Z is turned on to drain water from the container at a rate of 5 ℓ per minute for 16 minutes. What is the height of the water level in the container in the end? Give the answer in 1 decimal place.
1 ℓ = 1000 cm³ 
7 ℓ = 7000 cm³ 
5 ℓ = 5000 cm³ 
63 ℓ = 63000 cm³

Volume of water flowed in from Tap Y
= 18 x 7000
= 126000 cm³

Volume of water from drained from Tap Z
= 16 x 5000
= 80000 cm³

Volume of water left in the container
= 126000 - 80000
= 46000 cm³

Base area of the container
= 63000 ÷ 35
= 1800 cm² 

Height of water left in the container
= 46000 ÷ 1800
≈ 25.6 cm

Answer(s): 25.6 cm