An empty rectangular container has a capacity of 196 ℓ and a height of 70 cm. At 8 a.m., Tap R is turned on to fill the container at a rate of 8 ℓ per minute for 18 minutes. After 10 minutes, Tap S is turned on to drain water from the container at a rate of 10 ℓ per minute for 5 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 
8 ℓ = 8000 cm³ 
10 ℓ = 10000 cm³ 
196 ℓ = 196000 cm³

Volume of water flowed in from Tap R
= 18 x 8000
= 144000 cm³

Volume of water from drained from Tap S
= 5 x 10000
= 50000 cm³

Volume of water left in the container
= 144000 - 50000
= 94000 cm³

Base area of the container
= 196000 ÷ 70
= 2800 cm² 

Height of water left in the container
= 94000 ÷ 2800
≈ 33.6 cm

Answer(s): 33.6 cm