YOU SAID:

if the glass is half empty and a glass is half full, how much water is there?

INTO JAPANESE

コップが半分空で、コップが半分いっぱいの場合、どれくらいの水がありますか？

BACK INTO ENGLISH

If the glass is half empty and half full, how much water do you have?

INTO JAPANESE

グラスが半分空で半分がいっぱいの場合、どれくらいの水がありますか？

BACK INTO ENGLISH

If the glass is half empty and half full, how much water do you have?