Complete 4849

The first sluice empties a complete pond in 45 days. If 2/3 of the pond is drained in 15 days, a second sluice is still needed for ten days. How many days would it empty itself through just the second sluice?

Correct answer:

x =  30 d

Step-by-step explanation:

15/45 · x + 10 = 2/3 · x

15x = 450

x = 450/15 = 30

x = 30

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