Answer:
Time budget for your lunch trip is 56 minutes.
Explanation:
Given : You have one hour for lunch. You want to go to your favorite sub shop, which is 18 minutes from your job. You called; the average wait time today is 20 minutes.
To find : How much time should you budget for your lunch trip?
Solution :
Time taken to go from sub shop to office is 18 minutes.
Same time taken from office to sub shop is 18 minutes.
Total time in travelling is 18+18=36 minutes.
The average wait time today is 20 minutes.
Total time budget for your lunch trip is 36+20=56
Therefore, time budget for your lunch trip is 56 minutes.