Question 1102248
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<pre>
Let "u" be the speed under the question (the speed to get the town on time).


Then the condition says 


{{{3/u}}} - {{{3/k}}} = 1,    (it is your time equation,
                 which is a literal translation of the condition).


From the equation, after multiplying both sides by (u*k), you have


3k - 3u = uk,

3k = uk + 3u  ====>  u*(k+3) = 3k  ====>  u = {{{(3k)/(k+3)}}} miles per hour.


<U>Answer</U>.  The speed under the question (the speed to get the town on time) is  {{{(3k)/(k+3)}}} miles per hour.
</pre>

Solved.


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