Question 446364
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Palmer's average running speed is 3 Kilometers per hour faster than his walking speed. 
If Palmer can run around a 20-Kilometer course in 2 hours, how many hours would it take 
{{{highlight(cross(her))}}} <U>for</U> Palmer to walk the same course?
I NEED TO SEE THE WORK ON HOW YOU GOT THE ANSWER!!
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) &nbsp;&nbsp;The solution in the post by @mananth is &nbsp;ABSOLUTELY &nbsp;WRONG.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) &nbsp;&nbsp;This problem is &nbsp;PRIMITIVE &nbsp;at the level of &nbsp;4th or &nbsp;5th grade student: &nbsp;it is not an &nbsp;Algrbra

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;or a &nbsp;Pre-algebra problem - - - it is an &nbsp;Arithmetic problem.



<pre>
          <U>Step by step solution</U>


(1)  the running speed is  {{{20/2}}} = 10 kilometers per hour, or 10 km/h.


(2)  The walking speed is 3 km/h slower, so the walking speed is 10-3 = 7 km/h.


(3)  Hence, the time for Palmer to walk the 20 km course is  {{{20/7}}} = 2{{{6/7}}}  hours.


<U>ANSWER</U>.  The time for Palmer to walk the course is  2{{{6/7}}} hours, under given conditions.
</pre>

Solved completely at the Arithmetic level.