(D * 30) + (N * 25) = 1225
D + N = 45
The Diaz family and the Nguyen family each used their sprinklers last summer. The water output rate for the Diaz family's sprinkler was 30L 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 45 hours, resulting in a total water output of 1225L. How long was each sprinkler used?
1 answer
1 answer