Question 31054
so, Sally paints 1/4 of the house in an hour
and John paints 1/6 of the house in an hour.


Together, they paint {{{ (1/4)+(1/6) }}} in 1 hour.
--> {{{ (3/12)+(2/12) }}}
--> {{{ 5/12 }}} in 1 hour


So, 5/12 of a house in 1 hour
5 houses in 12 hours
1 house in 12/5 hours


--> together they paint it in 2.4 hours which is 2 hours and 24 minutes.


jon.