Answer:
14 cm³ i think
Step-by-step explanation:
so it was full then it became 4 full ... so 42cm³ of juice filled what equals 3 full glasses
but the glass is already full with juice even before we poured juice ... 42 ÷ 3 = 14
so one glass is 14 cm³
but note that I don't know the question if you can take a photo and attach it i would be grateful