Question 1145371
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<pre>
Let "d" be one way distance under the question.


Then  {{{d/30}}}  is the driving time in one direction, in hours, while

      {{{d/60}}}  is the driving time in other direction.


The total "time" equation is  


    {{{d/30}}} + {{{d/60}}} = {{{5/4}}}   hours.


To solve it, multiply both sides by 60.  You will get


    2d   +  d = 75

    3d        = 75

     d        = 25 miles.      <U>ANSWER</U>


<U>CHECK</U>.   {{{25/30}}} + {{{25/60}}} = {{{50/60}}} + {{{25/60}}} = {{{75/60}}} = {{{5/4}}} hours.   ! Correct !
</pre>

Solved.


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Using &nbsp;"time" &nbsp;equation is the &nbsp;STANDARD &nbsp;method of solving such problems.


It is simple, &nbsp;logical, &nbsp;straightforward, &nbsp;economic and robust &nbsp;(works in standard way for any input data). 


Going in this way, &nbsp;you will never make a mistake - the logic of the method 
prevents you of making mistakes.


From this lesson, &nbsp;learn on how to write, &nbsp;how to use and how to solve a &nbsp;"time" &nbsp;equation.


To see many other similar solved problems, &nbsp;look into the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/travel/Had-a-car-move-faster-it-would-arrive-quicker.lesson>Had a car move faster it would arrive sooner</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/travel/How-far-do-you-live-from-school.lesson>How far do you live from school?</A> 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/travel/Earthquake-waves.lesson>Earthquake waves</A> 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/travel/Time-equation-HOW-TO-write-it-and-how-to-solve-it.lesson>Time equation: HOW TO use, HOW TO write and HOW TO solve it</A> 

in this site.