An empty rectangular container has a capacity of 60 ℓ and a height of 10 cm. At 8 a.m., Tap V is turned on to fill the container at a rate of 5 ℓ per minute for 17 minutes. After 7 minutes, Tap W is turned on to drain water from the container at a rate of 6 ℓ per minute for 7 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 
5 ℓ = 5000 cm³ 
6 ℓ = 6000 cm³ 
60 ℓ = 60000 cm³

Volume of water flowed in from Tap V
= 17 x 5000
= 85000 cm³

Volume of water from drained from Tap W
= 7 x 6000
= 42000 cm³

Volume of water left in the container
= 85000 - 42000
= 43000 cm³

Base area of the container
= 60000 ÷ 10
= 6000 cm² 

Height of water left in the container
= 43000 ÷ 6000
≈ 7.2 cm

Answer(s): 7.2 cm