The figure shows a rectangular container measuring 32 cm by 23 cm by 42 cm. Risa poured 342 mℓ of water into the container. Then, she turned on two taps at the same time to fill up the container with water. Water was flowing from both taps at the same rate. After 12 minutes, both taps were turned off but 2.4 ℓ of water had overflowed and was collected in a tray. Find the rate of the flow of water of each tap in millilitres per minute.
Volume of the container
= 32 x 23 x 42
= 30912 cm³
= 30912 mℓ

Volume of the remaining space after water was poured in
= 30912 - 342
= 30570 mℓ 

1 ℓ = 1000 mℓ
2.4 ℓ = 2400 mℓ

Volume of water contributed by 2 taps
= 30570 + 2400
= 32970 mℓ

Volume of water contributed by 1 tap
= 32970 ÷ 2 
= 16485 mℓ 

Rate of flow per minute
= 16485 ÷ 12
= 1373.75 mℓ/min

Answer(s): 1373.75 mℓ/min