Cylinder Z and Cylinder A have a total amount of 1737 mℓ of water. For Cylinder A and Cylinder B, the total amount of water is 4719 mℓ. The amount of water in Cylinder Z is ³₅ the amount of water in Cylinder B. What is the average amount of water in the 3 cylinders?
Cylinder Z = 3 u
Cylinder B = 5 u 

Cylinder A + Cylinder Z = 1737 --- (1)
Cylinder A + Cylinder B = 4719 --- (2)

(2) - (1)
(Cylinder A + Cylinder Z) - (Cylinder A + Cylinder B) = 4719 - 1737
5 u - 3 u = 2982
2 u = 2982

1 u = 2982 ÷ 2 = 1491
Cylinder Z = 3 u = 1491 x 3 = 4473

Cylinder Z + Cylinder A + Cylinder B = 4473 + 4719 = 9192 mℓ

Average amount of water in the 3 cylinders
= 9192 ÷ 3 
= 3064 mℓ

Answer(s): 3064 mℓ