Question

Wuestion 19

The Ross family and the Collins family each used their sprinklers last summer. The water output rate for the Ross family's sprinkler was 25 L per hour. The
output rate for the Collins family's sprinkler was 30 L per hour. The families used their sprinklers for a combined total of 60 hours, resulting in a total water
output of 1625 L. How long was each sprinkler used?

Answer 1

25x+30x= 1625
x+y= 60
Put into calculator and you get
x=35 y=25