An empty rectangular container has a capacity of 76 ℓ and a height of 200 cm. At 9 a.m., Tap X is turned on to fill the container at a rate of 7 ℓ per minute for 17 minutes. After 2 minutes, Tap Y is turned on to drain water from the container at a rate of 4 ℓ per minute for 18 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 
4 ℓ = 4000 cm³ 
76 ℓ = 76000 cm³

Volume of water flowed in from Tap X
= 17 x 7000
= 119000 cm³

Volume of water from drained from Tap Y
= 18 x 4000
= 72000 cm³

Volume of water left in the container
= 119000 - 72000
= 47000 cm³

Base area of the container
= 76000 ÷ 200
= 380 cm² 

Height of water left in the container
= 47000 ÷ 380
≈ 123.7 cm

Answer(s): 123.7 cm