Answer
1 cup/sec = 225 gallons/hour
The tank will be empty in 22.22 hours.
Step-by-step explanation
To do this, we need to first note that
1 gallon = 16 cups
1 hour = 3600 seconds
So,

So, now, we can then calculate how many hours it will take the tank to become empty.
The tank has a volume of 5000 gallons
Rate of leakage = (Number of gallons)/(Number of hours)
Rate of leakage = 1 cup/sec = 225 gallons/hour
Number of gallons = 5000
Number of hours = ?

Hope this Helps!!!