The figure shows a rectangular tank measuring 49 cm by 17 cm by 11 cm. Nora poured 115 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 14 minutes, both taps were turned off but 1.9 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
= 49 x 17 x 11
= 9163 cm³
= 9163 mℓ

Volume of the remaining space after water was poured in
= 9163 - 115
= 9048 mℓ 

1 ℓ = 1000 mℓ
1.9 ℓ = 1900 mℓ

Volume of water contributed by 2 taps
= 9048 + 1900
= 10948 mℓ

Volume of water contributed by 1 tap
= 10948 ÷ 2 
= 5474 mℓ 

Rate of flow per minute
= 5474 ÷ 14
= 391 mℓ/min

Answer(s): 391 mℓ/min