Question 1082369
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<pre>
The proportion

{{{350/(3*15)}}} = {{{700/(2*x)}}}

express the rate of work for each of the two scenarios.

It is equivalent to

{{{350/(3*15)}}} = {{{350/x}}},

{{{1/45}}} = {{{1/x}}},

x = 45.
</pre>

<U>Answer</U>.  45 minutes.


This method is &nbsp;&nbsp;a) &nbsp;simplest &nbsp;&nbsp;and &nbsp;&nbsp;b) it works ALWAYS.


So,  I recommend it to you for using in the most difficult cases.


To see more solved problems of this type, look into the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Rate-of-work-word-problems/Rate-of-work-problem.lesson>Rate of work problems</A> 

in this site.