The king family's sprinkler was used for 30hours. the wong family's sprinkler was used for 15 hours, there was a combined total output of 1275L of water what was the water output rate for each sprinkler if the sum of the 2 rates was 55L per hour

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?