The figure shows a rectangular tank measuring 42 cm by 34 cm by 39 cm. Linda poured 626 mℓ of water into the tank. Then, she turned on two taps at the same time to fill up the tank with water. Water was flowing from both taps at the same rate. After 3 minutes, both taps were turned off but 2.9 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 tank
= 42 x 34 x 39
= 55692 cm³
= 55692 mℓ

Volume of the remaining space after water was poured in
= 55692 - 626
= 55066 mℓ 

1 ℓ = 1000 mℓ
2.9 ℓ = 2900 mℓ

Volume of water contributed by 2 taps
= 55066 + 2900
= 57966 mℓ

Volume of water contributed by 1 tap
= 57966 ÷ 2 
= 28983 mℓ 

Rate of flow per minute
= 28983 ÷ 3
= 9661 mℓ/min

Answer(s): 9661 mℓ/min