A rectangular tank measuring 75 cm by 70 cm by 34 cm was ¹₃ filled with water. Gillian turned on a tap at 7.14 p.m. to fill more water into the tank. She turned off the tap at 7.24 p.m. The tank was ⁵₇ 
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
= ¹₃ x 75 x 70 x 34
= 59500 cm³

Volume of water in the tank in the end
= ⁵₇ x 75 x 70 x 34
= 127500 cm³

Volume of water added into the tank by the tap
= 127500 - 59500
= 68000 cm³

1000 mℓ = 1 ℓ
68000 mℓ = 68000 ÷ 1000 = 68 ℓ

From 7.14 p.m. to 7.24 p.m.: 10 min

Volume of water that flowed out of the tap in a minute
= 68 ÷ 10
= 6.8 ℓ 

Answer(s): 6.8 ℓ