There are two water containers. The first container is empty, whilst the second contains 48 liters of water.
How long will in take for the second container to reach full capacity?
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There are two water containers. The first container is empty, whilst the second contains 48 liters of water.
How long will in take for the second container to reach full capacity?
Let's begin by observing the blue line that represents the second container.
Note that it will be full at the point where it starts to become a continuous line.
Hence let's draw a vertical line from this point to the X-axis which marks the minutes.
We can observe that the line reaches 22, meaning the container will be full in 22 minutes.
22 minutes
Look at the function shown in the figure.
When is the function positive?
Look at the starting points! The blue line B starts at 48 liters (matching the problem), while red line A starts at 0 liters (the empty first container).
When the line becomes continuous horizontal, it means the container has reached its maximum capacity and stops filling. This is your target point!
The y-axis shows liters (160L is the capacity), while the x-axis shows minutes (22 is the time). Always read the correct axis for what the question asks!
Follow these steps:
Look at the labels and colors! Red line A and blue line B are clearly marked. Also check the starting values - one starts at 0L, the other at 48L.
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