Answer:
600 ml
Explanation:
Given,
240 ml of milk provides about 8 grams of protein,
That is, the ratio of grams of protein provided and milk =

Let x be the quantity of milk in ml that provides 20 grams of protein,
So, the ratio of grams of protein provided and milk =


By cross multiplication,
8x = 4800
Divide both sides by 8,
x =
= 600
Hence, 600 ml milk should be needed to provide 20 grams of protein.