Question 274937
Mary can paint a house in 4 hrs.John can paint the same house in 6 hrs.
 How long will it take to paint house together
:
You have to use the "shared work equation"
where
t = time (in hrs) required when working together
and
completed job = 1 (a painted house)
:
Each will do a fraction of the job, the two fractions add up to 1
{{{t/4}}} + {{{t/6}}} = 1
:
That's the setup. Email me if you have difficulty with it: ankor@att.net