Question

The Hall family and the Nguyen family each used their sprinklers last summer. The water output rate for the Hall family's sprinkler was
35L
per hour. The water output rate for the Nguyen family's sprinkler was
25L
per hour. The families used their sprinklers for a combined total of
40
hours, resulting in a total water output of
1150L
. How long was each sprinkler used?

Answer 1

@misty1212