Some simple distance vs time problems?

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To solve the distance vs. time problems, the key formula to use is time equals distance divided by speed. For example, to calculate the time for a truck to drive 31 kilometers at a speed of 90 kilometers per hour, divide 31 by 90, resulting in approximately 0.344 hours or about 20.7 minutes. The discussion emphasizes the need to apply this formula to various routes for transporting lettuce from different locations. Participants are encouraged to provide examples and assist with calculations to complete the homework assignment. Understanding these calculations is crucial for accurately filling in the total time to reach the final destination.
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Homework Statement


The produce manager at a grocery store in barrie has arranged to have lettuce shipped to his store from Holland Marsh, Ont., Thorold, Ont., and Solano, California. Examine the following data table for the various truck routes.

I made the table on microsoft word and then uploaded it, so here's the screen:
http://img840.imageshack.us/i/transportphysicsproblem.png/

Now what I have to do is calculate the time per mode of transport of the lettuce from each starting point. Then I would use the data to complete the last "total time to reach final destination" in the table. I don't know where to begin, any help? If maybe you can do one or two as examples, I would greatly appreciate it. I am doing this through correspondence and this question is worth a lot of marks, and there aren't any teachers to offer assistance so I'm kind of stuck.
 
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How long does it take a truck to drive 31 kilometers at 90 kilometers per hour?
 

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