At 8:30 A. M., Burt started filling a 3,600-gallon pond. At 10:30 A. M., he had filled 1,800 gallons. At what time will the pond be full?

12:30 PM

Step-by-step explanation:

The capacity of pond= 3600 gallon

The Burt is started at 8:30 AM  and filled 1800 gallons till 10:30 AM

So, in 2 hours the Burt had filled 1800 gallons.

So, rate of filling = 1800/2=900 gallon/hour

The remaining volume of the pond = 3600-1800 = 1800 gallons

Time to fill the remaining volume = 1800/900=2 hour.

So, it will take 2 hours after 10:30 AM to fill the pond completely.

Hence. the pond will be filled at 12:30 PM.