Question

3. The tank has 700 liters oil and is being drainad ar a constart rate of 25 liters per minute.

a) How do you write a linear function V for the number of liten in the tank after t minutes

Tassuming that the drainage started art-012

bi Compute how many litera are in the tank after 75 minutes and 55 seconds.

Answer 1

a)

$$V(t)=700-25t$$

b)

$$75\ min\ 55 sec=(75+\dfrac{55}{60})min=\dfrac{911}{12}\ min$$

$$V(t)=700-25(\dfrac{911}{12})<0$$

We cannot consider the time 75min 55 sec.

How long will it take for the tank to be drained empty?

$$V=700-25t=0$$

$$t=\dfrac{700}{25}$$

$$t=28\ min$$