A rectangular container measuring 70 cm by 60 cm by 28 cm was ¹₅ filled with water. Penelope turned on a tap at 7.11 p.m. to fill more water into the container. She turned off the tap at 7.23 p.m. The container was ⁷₁₀ 
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
= ¹₅ x 70 x 60 x 28
= 23520 cm³

Volume of water in the container in the end
= ⁷₁₀ x 70 x 60 x 28
= 82320 cm³

Volume of water added into the container by the tap
= 82320 - 23520
= 58800 cm³

1000 mℓ = 1 ℓ
58800 mℓ = 58800 ÷ 1000 = 58.8 ℓ

From 7.11 p.m. to 7.23 p.m.: 12 min

Volume of water that flowed out of the tap in a minute
= 58.8 ÷ 12
= 4.9 ℓ 

Answer(s): 4.9 ℓ