Tom's family stopped for lunch for 50 minutes.
Calculating Tom's Family's Lunch Break Duration:
Identify the start and end times of the lunch break:
From the given data points, we can see that the distance traveled remains constant (3000m) between 40 minutes and 90 minutes. This indicates that Tom's family stopped for lunch during this time interval.
Read the corresponding times:
The start time of the lunch break is 40 minutes and the end time is 90 minutes.
Calculate the duration:
Lunch break duration = End time - Start time
Lunch break duration = 90 minutes - 40 minutes
Lunch break duration = 50 minutes
Therefore, Tom's family stopped for lunch for 50 minutes.