Taking the information given and letting Pn = pumping rate of the new pump and
Po = pumping rate of the old pump (both in gallons/hour)
Now, let's assume that the pool has 3000 gallons (This is arbitrary... could be any reasonable number)
Then 6Pn + 6Po = 3000
and 15Po = 3000
So,
Po = 200 gpm
Substiting back in the other equation, we find that
Pn = 300 gpm

Mark J.
12/03/19
Desiray J.
So how many hours would it take?12/03/19