To determine how long the person exercised based on the provided data (time in seconds and volume of air inhaled), we can analyze the volume of air inhaled over time.
From the data provided:
- For the first 60 seconds (10s to 60s), the volume of air inhaled is consistent at 3.6 liters for each of those time points, indicating a steady pattern of inhalation typical of a resting or low-intensity state.
- At the 60-second mark, the volume of air inhaled increases to 5.2 liters, suggesting the beginning of increased effort, possibly indicative of exercise.
- From 60 seconds to 80 seconds (60s to 80s), the inhaled volume remains at 5.2 liters, suggesting sustained exertion.
- At the 90-second mark, the inhaled volume decreases to 4.6 liters, then further decreases to 4.2 liters at 100 seconds, and finally returns to a lower level of 3.6 liters at the 110-second mark.
The indication of exercise is primarily noted from the 60-second mark to the 90-second mark, where the person appears to be inhaling more air due to increased physical activity. After that, there is a decrease in inhalation volume, suggesting either a reduction in intensity or a return to a resting state.
Answer:
The person exercised for approximately 30 seconds.
Explanation:
This conclusion is drawn from the data indicating that the exercise began at around the 60-second mark when the volume inhaled increased from 3.6 liters to 5.2 liters, which indicates an increase in physical effort. The exercise can be inferred to continue until the volume starts to decline after the 90-second mark. Therefore, the period during which there was an increase in inhalation volume (from 60 seconds to 90 seconds) can be understood as the exercise duration, totaling approximately 30 seconds.
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