<PRE><B>Question 913228</B>
Julius can paint a house three times faster than Ruben. Working together, they can paint a house in 4 days. How long would it take the faster painter if he works alone?


let Julius take x hours to paint
he does 1/x of job in 1 hour


Rueben takes 3x hours
Rueben does 1/3x of the job in 1 hour

together they take 4 days
they do1/4 of the job in 1 day
1/x + 1/3x = 1/4

4/3x= 1/4
3x=16
x= 16/3 hours
julien  Working together, they can paint a house in 4 days. How long would it take the faster painter if he works alone?</PRE>