Question 482610
1/4 time is {{{ (3/3)*(1/4) = 3/12 }}}
1/3 time is {{{ (4/4)*(1/3) = 4/12 }}}
{{{ 3/12 + 4/12 = 7/12 }}}
To find the remaining time find:
{{{ 1 - 7/12 = 5/12 }}}
What is this fraction of 40 hrs equal to?
{{{ (5/12)*40 = 16.666 }}} hrs
Note that {{{ .666 }}} hrs = {{{ (2/3)*60 = 40 }}} min
The last person will have to work 16 hrs and 40 min
to make a total of 40 hrs