A rectangular container measuring 88 cm by 60 cm by 24 cm was to be filled with water by two taps, H and J. Tap H which fills the tank at a rate of 8 ℓ per minute was first turned on for 3 minutes before Tap J was turned on as well. If the tank was filled to the brim in a total of 5 minutes from the time when Tap H was first turned on, what is the rate at which Tap J fills the tank? Give your answer in ℓ per minute correct to 1 decimal place.
Total volume of the container
= 88 x 60 x 24
= 126720 cm
3 1 ℓ = 1000 cm
3 8 ℓ = 8000 cm
3 Volume of water filled by Tap H
= 8000 x 5
= 40000 cm
3 Volume of water filled by Tap J
= 126720 - 40000
= 86720 cm
3 Rate in which Tap J fills the container
= 86720 ÷ 2
= 43360 cm3/min
43360 mℓ/min
= 43.36 ℓ/min
≈ 43.4 ℓ/min (Correct to 1 decimal place)
Answer(s): 43.4 ℓ/min