The amount liters of liquid needed for 2 servings of pudding.
[tex]600 + 120[/tex]
[tex] = 720 \: ml[/tex]
[tex]720 \times 2[/tex]
[tex] = 1440 \: ml[/tex]
[tex]\boxed{\sf{Formula: 1 \: L = 1000 \: ml}}[/tex]
[tex] \frac{1440}{1000} [/tex]
[tex]\large\boxed{\sf{= 1.44 \: L}}[/tex]
Therefore, 1.44 litres of liquid are required for 2 servings.