Question 1121130
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Jessica covered in 2 hours what Kathryn covered in 5 hours, so Jessica's speed was 5/2 of Kathryn's speed.<br>
Formal algebra, or a bit of logical reasoning and mental arithmetic, tells us that, since 5/2 of Kathryn's speed is 30mph faster than Kathryn's speed, the two speeds are 20mph and 50mph.<br>
So Kathryn's average speed was 20mph.<br>
Comment....  5 hours at 20mph = 100 miles -- that's a rather large town.......