Question

The Cooper family and the Alexander family each used their sprinklers last summer. The Cooper family's sprinkler was used for



20
hours. The Alexander family's sprinkler was used for



15
hours. There was a combined total output of



1200

L
of water. What was the water output rate for each sprinkler if the sum of the two rates was



70

L
per hour?

Answer 1

@YZY help please im sorry :(

Answer 2

@dan815