Question 1150906
.
<pre>

Let "d" be the distance to the airport.


Then the time from home to the destination point at 30 mph is  {{{d/30}}} hours.

     The time from home to the destination point at 40 mph is  {{{d/40}}} hours.



The difference of these times is 13 minutes PLUS 7 minutes, or 20 minutes, which is  {{{1/3}}}  of an hour.


It gives you this "time" equation


    {{{d/30}}} - {{{d/40}}} = {{{1/3}}}.


To solve it, multiply both sides by 120.  You will get


    4d - 3d = 40,

     d      = 40.


<U>ANSWER</U>.  The distance to the airport is 40 miles.
</pre>

Solved.


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


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&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> 

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