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Tank B, which initially contained 80 liters of water, is being drained at a rate of 2.5 liters per minute. For how many minutes has the water been draining when Tank B contains 75 liters of water?

Respuesta :

We get that the function that models this situation is

[tex]L=80-2.5m[/tex]

where L is the liters the tank contains and m is the minutes that has passed. So we get:

[tex]75=80-2.5m\rightarrow m=\frac{-80+75}{-2.5}=2[/tex]

so the tank has been drained for 2 minutes

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