A rectangular container measuring 50 cm by 40 cm by 33 cm was ¹₈ filled with water. Ivory turned on a tap at 1.39 p.m. to fill more water into the container. She turned off the tap at 1.54 p.m. The container was ⁷₈ 
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 container at first
= ¹₈ x 50 x 40 x 33
= 8250 cm³

Volume of water in the container in the end
= ⁷₈ x 50 x 40 x 33
= 57750 cm³

Volume of water added into the container by the tap
= 57750 - 8250
= 49500 cm³

1000 mℓ = 1 ℓ
49500 mℓ = 49500 ÷ 1000 = 49.5 ℓ

From 1.39 p.m. to 1.54 p.m.: 15 min

Volume of water that flowed out of the tap in a minute
= 49.5 ÷ 15
= 3.3 ℓ 

Answer(s): 3.3 ℓ