SOLUTION: Mary can roof their house in 4 days working alone, her husband can roof their house in 6 days working alone. If they work together how long will it take to roof the house?
Algebra.Com
Question 1154119: Mary can roof their house in 4 days working alone, her husband can roof their house in 6 days working alone. If they work together how long will it take to roof the house?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
is Mary's rate: [ 1 job ] / [ 4 days ]
is husband's rate: [ 1 job ] / [ 6 days ]
----------------------------------------------------
Let = time in days for job to get done
with them working together
Add their rates of working
Multiply both sides by
days
They get it done in 2.4 days
--------------------------------
check:
OK
RELATED QUESTIONS
Mary can roof her house in 7 days working alone. Her husband can roof their house in 14... (answered by richwmiller)
it takes doug 6 days to roof a house. if his son helps him,the job can be done in 4 days. (answered by chitra,Edwin McCravy)
one roofer can put a new roof on a house three times faster than another. Working... (answered by chosenpoint)
one roofer can put a new roof on a house three times faster than another. Working... (answered by edjones)
One roofer can put a new roof on a house three times faster than another. Working... (answered by josgarithmetic,ikleyn,greenestamps)
one roofer can put a new roof on a house three times faster than another. working... (answered by ikleyn)
One roofer can put a new roof on a house three times faster than another. Working... (answered by Theo)
One roofer can put a neew roof on a house three times faster than another. Working... (answered by stanbon,checkley71)
Two painters, working together, can paint a house in 3 days.
One painter working alone... (answered by ikleyn,MathTherapy)