<PRE><B>Question 1135514</B>
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&lt;pre&gt;
Let x be the distance under the question.


Then you have this &quot;time&quot; equation


{{{x/315}}} - {{{x/420}}} = 2  minutes.           &lt;&lt;&lt;---=== Every fraction on the left side is the time to cover the distance . . . 


To solve it, multiply both sides by 315*420. You wiil get


420x - 315x = 2*315*420


105x = 264600


x = {{{264600/105}}} = 2520 ft.     &lt;U&gt;ANSWER&lt;/U&gt;


&lt;U&gt;CHECK&lt;/U&gt;.   {{{2520/315}}} = 8 minutes;   {{{2520/420}}} = 6 minutes;   8 - 6 = 2 minutes.   ! Correct !
&lt;/pre&gt;

Solved


From this solution, &amp;nbsp;learn on how to write, &amp;nbsp;how to use and how to solve a &amp;nbsp;&quot;time&quot; &amp;nbsp;equation.


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To see many other similar solved problems, &amp;nbsp;look into the lessons

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in this site.




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