A rectangular tank measuring 45 cm by 25 cm by 32 cm was ¹₄ filled with water. Rachel turned on a tap at 6.12 p.m. to fill more water into the tank. She turned off the tap at 6.23 p.m. The tank was ⁴₅ 
filled with water. Given that the water flowed out of the tap at the same rate, find the volume of water that flowed out of the tap in a minute. Give your answer in litres.
Volume of water in the tank at first
= ¹₄ x 45 x 25 x 32
= 9000 cm³

Volume of water in the tank in the end
= ⁴₅ x 45 x 25 x 32
= 28800 cm³

Volume of water added into the tank by the tap
= 28800 - 9000
= 19800 cm³

1000 mℓ = 1 ℓ
19800 mℓ = 19800 ÷ 1000 = 19.8 ℓ

From 6.12 p.m. to 6.23 p.m.: 11 min

Volume of water that flowed out of the tap in a minute
= 19.8 ÷ 11
= 1.8 ℓ 

Answer(s): 1.8 ℓ