Cylinder W and Cylinder X have a total amount of 2382 mℓ of water. For Cylinder X and Cylinder Y, the total amount of water is 4572 mℓ. The amount of water in Cylinder W is ³₈ the amount of water in Cylinder Y. What is the average amount of water in the 3 cylinders?
Cylinder W = 3 u
Cylinder Y = 8 u 

Cylinder X + Cylinder W = 2382 --- (1)
Cylinder X + Cylinder Y = 4572 --- (2)

(2) - (1)
(Cylinder X + Cylinder W) - (Cylinder X + Cylinder Y) = 4572 - 2382
8 u - 3 u = 2190
5 u = 2190

1 u = 2190 ÷ 5 = 438
Cylinder W = 3 u = 438 x 3 = 1314

Cylinder W + Cylinder X + Cylinder Y = 1314 + 4572 = 5886 mℓ

Average amount of water in the 3 cylinders
= 5886 ÷ 3 
= 1962 mℓ

Answer(s): 1962 mℓ