A rectangular container measuring 70 cm by 56 cm by 36 cm was to be filled with water by two taps, K and L. Tap K which fills the tank at a rate of 6 ℓ per minute was first turned on for 4 minutes before Tap L was turned on as well. If the tank was filled to the brim in a total of 5 minutes from the time when Tap K was first turned on, what is the rate at which Tap L fills the tank? Give your answer in ℓ per minute correct to 1 decimal place.
Total volume of the container
= 70 x 56 x 36
= 141120 cm³ 

1 ℓ = 1000 cm³ 
6 ℓ = 6000 cm³ 

Volume of water filled by Tap K
= 6000 x 5
= 30000 cm³

Volume of water filled by Tap L
= 141120 - 30000
= 111120 cm³ 

Rate in which Tap L fills the container
= 111120 ÷ 1
111120 mℓ/min
= 111.12 ℓ/min
≈ 111.1 ℓ/min (Correct to 1 decimal place)

Answer(s): 111.1 ℓ/min