A rectangular tank measuring 75 cm by 70 cm by 24 cm was ¹₅ filled with water. Anna turned on a tap at 7.39 p.m. to fill more water into the tank. She turned off the tap at 7.53 p.m. The tank 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 tank at first
= ¹₅ x 75 x 70 x 24
= 25200 cm³

Volume of water in the tank in the end
= ⁹₁₀ x 75 x 70 x 24
= 113400 cm³

Volume of water added into the tank by the tap
= 113400 - 25200
= 88200 cm³

1000 mℓ = 1 ℓ
88200 mℓ = 88200 ÷ 1000 = 88.2 ℓ

From 7.39 p.m. to 7.53 p.m.: 14 min

Volume of water that flowed out of the tap in a minute
= 88.2 ÷ 14
= 6.3 ℓ 

Answer(s): 6.3 ℓ