Answer:
The answer is option (C). The total quantity he drinks per day=19/28 gallons of water
Explanation:
The expression to get the amount of gallons he can drink in a day is as follows;
g=f×T
where;
g=quantity consumed per day
f=fraction of the total that's been drank
T=total quantity of water
In our case;
g=unknown
f=1/7
T=4 3/4 gallons
replacing;
g=(1/7)×4 3/4
g=(1/7)×(19/4)
g=19/28
The total quantity he drinks per day=19/28 gallons of water