The Rodriguez family and the Foster family each used their sprinklers last summer. The water output rate for the Rodriguez family's sprinkler was

40L

per hour. The water output rate for the Foster 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

1375L

. How long was each sprinkler used?

Question

Jenny Bowen

Mathematics

24 July, 20:01

The Rodriguez family and the Foster family each used their sprinklers last summer. The water output rate for the Rodriguez family's sprinkler was

40L

per hour. The water output rate for the Foster 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

1375L

. How long was each sprinkler used?

+4

Answers (1)

Know the Answer?

Mayra Flowers · Answer 1

X+y=40

25x+40y=1375

25x+40 (40-x) = 1375

25x+1600-40x=1375

-15x=-225

X=15

15+y=40

Y=25

The Foster family used their sprinkler for 15 hours

The Rodriguez family used their sprinkler for 25 hours