3. Una piscina tiene una capacidad de [tex]320 \, \text{m}^3[/tex]. Si está hasta la mitad de su capacidad con agua y se le sacó un 40% de dicha cantidad, ¿cuánta agua deberemos agregarle para llenarla completamente?

To solve this problem, first, calculate how much water was taken out from the pool, which is 40% of half of the pool's capacity (320 m³). Therefore, 40% of (320 m³ / 2) = 40% of 160 m³ = 64 m³ was taken out. To fill the pool completely, you need to add the amount taken out back and fill the remaining half. Thus, you need to add 64 m³ to reach the full capacity.

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