A rectangular tank measuring 40 cm by 20 cm by 35 cm was ¹₇ filled with water. Dana turned on a tap at 3.31 p.m. to fill more water into the tank. She turned off the tap at 3.51 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
= ¹₇ x 40 x 20 x 35
= 4000 cm³

Volume of water in the tank in the end
= ⁴₇ x 40 x 20 x 35
= 16000 cm³

Volume of water added into the tank by the tap
= 16000 - 4000
= 12000 cm³

1000 mℓ = 1 ℓ
12000 mℓ = 12000 ÷ 1000 = 12 ℓ

From 3.31 p.m. to 3.51 p.m.: 20 min

Volume of water that flowed out of the tap in a minute
= 12 ÷ 20
= 0.6 ℓ 

Answer(s): 0.6 ℓ