<PRE><B>Question 1108659</B>
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&lt;pre&gt;
Since they move towards each other, their relative speed is the sum 45 mph + 30 mph = 75 mph.


It means that the distance between them decreases at the rate of 75 mph.


Hence, it will take {{{345/75}}} = {{{23/5}}} = {{{4}}}{{{3/5}}} hours = 4 hours and 36 minutes for the two trains to meet.
&lt;/pre&gt;

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For many similar solved Travel and Distance problems see the lessons

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=http://www.algebra.com/algebra/homework/word/travel/Travel-and-Distance-problems.lesson&gt;Travel and Distance problems&lt;/A&gt;  

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/word/travel/Travel-and-Distance-problems-for-two-bodies-moving-toward-each-other.lesson&gt;Travel and Distance problems for two bodies moving in opposite directions&lt;/A&gt; 

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/word/travel/Typical-catching-up-Travel-and-Distance-problems.lesson&gt;Travel and Distance problems for two bodies moving in the same direction (catching up)&lt;/A&gt;

in this site.


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