Question
A rectangular container measuring 71 cm by 57 cm by 25 cm was to be filled with water by two taps, Y and Z. Tap Y which fills the tank at a rate of 6 ℓ per minute was first turned on for 2 minutes before Tap Z was turned on as well. If the tank was filled to the brim in a total of 5 minutes from the time when Tap Y was first turned on, what is the rate at which Tap Z fills the tank? Give your answer in ℓ per minute correct to 1 decimal place.
3 m

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A rectangular container measuring 71 cm by 57 cm by 25 cm was to be filled with water by two taps, Y and Z. Tap Y which fills the tank at a rate of 6 ℓ per minute was first turned on for 2 minutes before Tap Z was turned on as well. If the tank was filled to the brim in a total of 5 minutes from the time when Tap Y was first turned on, what is the rate at which Tap Z fills the tank? Give your answer in ℓ per minute correct to 1 decimal place.