Question 1188075
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//     When you formulated/created your problem,  you forgot to mention that they started simultaneously . . . 



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. &nbsp;&nbsp;<U>Short Physics solution</U>



<pre>
Their rate of separation is  25 + 35 = 60 km/h,

so the process will take  {{{120/60}}} = 2 hours.
</pre>


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. &nbsp;&nbsp;<U>Long Algebra solution</U>



<pre>
Write the distance equation


    25t + 35t  = 120  kilometers

    (25 + 35)t = 120

        60t    = 120

          t    = 120/60 = 2 hours.    <U>ANSWER</U>
</pre>


Solved in two different ways for your better understanding.



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For simple Travel & Distance problems, &nbsp;see introductory lessons 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/travel/Travel-and-Distance-problems.lesson>Travel and Distance problems</A>  

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/travel/Travel-and-Distance-problems-for-two-bodies-moving-toward-each-other.lesson>Travel and Distance problems for two bodies moving in opposite directions</A> 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/travel/Typical-catching-up-Travel-and-Distance-problems.lesson>Travel and Distance problems for two bodies moving in the same direction (catching up)</A>

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