Question

A 60 gallon rain barrel has a small hole in the bottom of it. Every hour it loses 2 gallons of water. How many gallons of water are left in the barrel after two and a half hours?

Answer 1

We are told that the barrel can contain 60 gallons of water.

This barrel has a hole at its bottom and leaks out 2 gallons every hour, that is it loses 2 gallons every 1 hour.

This means that it will lose 4 gallons after 2 hours.

Since it loses 2 gallons every hour, that means it would lose 1 gallon every half hour or every 30 minutes.

Therefore after 2 and half hours, it would lose

4 gallons after 2 hours and 1 gallon after half hour, making a total of 5 gallons.

Therefore the answer is 5 gallons