Question 736904
Let {{{t = time}}} for {{{2nd}}} person to do the job

Let the completed {{{job = 1}}}

A shared work equation:

{{{24/40 + 24/t = 1}}}.......reduce the fraction

{{{3/5+ 24/t = 1}}}.....multiply both sides by {{{5t}}}

{{{3t + 5(24) = 5t}}}

{{{120 = 5t - 3t}}}

{{{120 = 2t}}}

{{{t = 60 min}}} ....time needed for {{{2nd}}} person to do the job
alone