A rectangular container measuring 71 cm by 57 cm by 36 cm was to be filled with water by two taps, F and G. Tap F which fills the tank at a rate of 8 ℓ per minute was first turned on for 2 minutes before Tap G was turned on as well. If the tank was filled to the brim in a total of 6 minutes from the time when Tap F was first turned on, what is the rate at which Tap G fills the tank? Give your answer in ℓ per minute correct to 1 decimal place.
Total volume of the container
= 71 x 57 x 36
= 145692 cm
3 1 ℓ = 1000 cm
3 8 ℓ = 8000 cm
3 Volume of water filled by Tap F
= 8000 x 6
= 48000 cm
3 Volume of water filled by Tap G
= 145692 - 48000
= 97692 cm
3 Rate in which Tap G fills the container
= 97692 ÷ 4
= 24423 cm3/min
24423 mℓ/min
= 24.423 ℓ/min
≈ 24.4 ℓ/min (Correct to 1 decimal place)
Answer(s): 24.4 ℓ/min