Number of cow=14
Each Cow drink 15 gallon
Bucket volume = 2 quarts
1 gallon is equal to 4 quarts.
Bucket vol= 0.5 gallon
For each cow= 15/0.5 = 30 times for each cow.
Since there are 14 cows,
30 x 14 = 420 times for 14 cows
Thus, each day he have to take total of 420 times for 14 cows.