An empty rectangular tank has a capacity of 60 ℓ and a height of 50 cm. At 6 a.m., Tap S is turned on to fill the tank at a rate of 7 ℓ per minute for 16 minutes. After 7 minutes, Tap T is turned on to drain water from the tank at a rate of 3 ℓ per minute for 13 minutes. What is the height of the water level in the tank in the end? Give the answer in 1 decimal place.
1 ℓ = 1000 cm³ 
7 ℓ = 7000 cm³ 
3 ℓ = 3000 cm³ 
60 ℓ = 60000 cm³

Volume of water flowed in from Tap S
= 16 x 7000
= 112000 cm³

Volume of water from drained from Tap T
= 13 x 3000
= 39000 cm³

Volume of water left in the tank
= 112000 - 39000
= 73000 cm³

Base area of the tank
= 60000 ÷ 50
= 1200 cm² 

Height of water left in the tank
= 73000 ÷ 1200
≈ 60.8 cm

Answer(s): 60.8 cm