Question 1205982
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Your answer is correct.


{{{1/4}}} + {{{1/3}}} = {{{3/12}}} + {{{4/12}}} = {{{7/12}}}.


<U>ANSWER</U>.  {{{12/7}}} hours.  It is 1{{{5/7}}} hours = 1 hour and 42.857 minutes.
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Solved.


Why do you panic ?


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It is a standard and typical joint work problem.


There is a wide variety of similar solved joint-work problems with detailed explanations in this site. &nbsp;See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Rate-of-work-word-problems/Word-problems-WORKING-TOGETHER-by-Fractions.lesson>Using Fractions to solve word problems on joint work</A> 


Read it and get be trained in solving joint-work problems.