A rectangular tank measuring 75 cm by 70 cm by 32 cm was ¹₄ filled with water. Gillian turned on a tap at 1.20 p.m. to fill more water into the tank. She turned off the tap at 1.35 p.m. The tank was ⁴₇ 
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 75 x 70 x 32
= 42000 cm³

Volume of water in the tank in the end
= ⁴₇ x 75 x 70 x 32
= 96000 cm³

Volume of water added into the tank by the tap
= 96000 - 42000
= 54000 cm³

1000 mℓ = 1 ℓ
54000 mℓ = 54000 ÷ 1000 = 54 ℓ

From 1.20 p.m. to 1.35 p.m.: 15 min

Volume of water that flowed out of the tap in a minute
= 54 ÷ 15
= 3.6 ℓ 

Answer(s): 3.6 ℓ