Respuesta :

Answer:

45 litres

Step-by-step explanation:

Let the whole tank contains x litres of water.

Therefore,

[tex] \frac{2}{3} x = 80 \\ \\ x = 80 \times \frac{3}{2} \\ \\ x = 40 \times 3 \\ \\ x = 120 \\ \\ \frac{3}{8} x = \frac{3}{8} \times 120 \\ \\ = 3 \times 15 \\ \\ = 45 \: liters[/tex]

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