A rectangular container measuring 75 cm by 70 cm by 32 cm was ¹₈ filled with water. Cindy turned on a tap at 4.30 p.m. to fill more water into the container. She turned off the tap at 4.51 p.m. The container was ⁹₁₀ 
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 75 x 70 x 32
= 21000 cm³

Volume of water in the container in the end
= ⁹₁₀ x 75 x 70 x 32
= 151200 cm³

Volume of water added into the container by the tap
= 151200 - 21000
= 130200 cm³

1000 mℓ = 1 ℓ
130200 mℓ = 130200 ÷ 1000 = 130.2 ℓ

From 4.30 p.m. to 4.51 p.m.: 21 min

Volume of water that flowed out of the tap in a minute
= 130.2 ÷ 21
= 6.2 ℓ 

Answer(s): 6.2 ℓ