The first bottle hold 6 quarts of water.
Solving word problems.
Solving word problems involves writing of problems in mathematical convention by using the appropriate form.
From the information given:
- The second bottle is 1/3 rd full
- The first bottle is half full
Suppose we represent the capacity of the first bottle with w.
Then the capacity of the second bottle as 1/3 of w expressed in 2 quarts.
Then ;

w = 3 × 2
w = 6
Therefore, we can conclude that the first bottle hold 6 quarts of water.