Hectoliters of water

The pool has a total of 126 hectoliters of water. The first pump draws 2.1 liters of water per second. A second pump pumps 3.5 liters of water per second.

How long will it take both pumps to drain four-fifths of the water at the same time?

Correct answer:

t =  1800 s

Step-by-step explanation:




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