The water output rate for the santana family sprinkler was gallons per hour

[8 pts] A cyclist traveled 10 kilometers per hour faster than an in-line skater. In the time it took the cyclist to travel 45.5 kilometers, the skater had gone 28 kilometers. Determine the speed of the skater.

[9 pts] The Santana family and the Wiler family each used their sprinklers last month. The water output rate for the Santana family's sprinkler was 20 gallons per hour. The water output rate for the Wiler family's sprinkler was 25 gallons per hour. The families used their sprinklers for a combined total of 24 hours, resulting in a total water output of 535 gallons. How many hours was each family’s sprinkler used?