Answer:
The pool holds 120,000 gallons of water.
Robert fills the pool at a rate of 10 gallons each minute.
That means for filling 120000 gallons, he will need = [tex]\frac{120000}{10}[/tex] = 12000 minutes
If we convert this to hour, then in 1 hour, [tex]10\times60[/tex] = 600 gallons can be filled.
So, the rate in gallons per hour = [tex]\frac{120000}{600}[/tex] = 200 gallons per hour.
Therefore, the rate at which Robert will fill the pool is 200 gallons per hour.
Yes the rate is constant.
