|
Question 1078154: Ana can paint her house by herself in 4 days. Her son need an additional day to complete the job if he works by himself. If they work together , find how long it takes to paint the house ?
Found 3 solutions by josgarithmetic, MathTherapy, ikleyn:
Answer by josgarithmetic(39630)   (Show Source):
Answer by MathTherapy(10556)  (Show Source):
You can put this solution on YOUR website! Ana can paint her house by herself in 4 days. Her son need an additional day to complete the job if he works by himself. If they work together , find how long it takes to paint the house ?
 is WRONG, WRONG, WRONG!
Work it out yourself and I'm sure you'll be able to get the correct answer!
Answer by ikleyn(52884)  (Show Source):
You can put this solution on YOUR website! .
Ana can paint her house by herself in 4 days. Her son need an additional day to complete the job if he works by himself.
If they work together, find how long it takes to paint the house ?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If Ana works alone, she makes  of the work per day (each day).
If her son works alone, he makes  of the work per day (each day).
When they work together, their combined rate is  =  =  .
In other words, if they work together, they make of the work per day.
So, their combined rate of work is of the job per day.
Hence, they will complete the job in  days =   of the day.
For a wide variety of similar solved joint-work problems with detailed explanations see the lessons
- Using Fractions to solve word problems on joint work
- Solving more complicated word problems on joint work
- Selected joint-work word problems from the archive
in this site.
Read them and get be trained in solving joint-work problems.
Also, you have this free of charge online textbook in ALGEBRA-I in this site
- ALGEBRA-I - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this textbook under the topic "Rate of work and joint work problems" of the section "Word problems".
-------------------
Below is my appeal to "josgarithmetic".
I know he will read it. I am sure !!
-------------------
Hey, "josgarithmetic",
I just asked you many times: what are you doing in this forum ?
Do you understand that you perform a role of a "local town idiot" in the forum ?
You are not able NEITHER solve correctly any problem, NOR explain it in a way in how it should be done . . .
Do you understand that when you appear here in the forum, you simple steel the opportunity from other tutors to do their work
in a way as it should be done ?
What is even worst, you steel the opportunity from students to learn on how to solve the problem correctly and to get
correct explanations.
I perfectly understand that there are problems there you can do something useful.
These problems are on line equations, intercepts, completing the square . . .
Work in this area and do not go across these borders to other areas where you are not an expert.
Nobody will touch you.
But if you will write in other subjects, I will criticize you every time you are wrong.
Do you understand me perfectly ?
If not, I will ask the supervisors of the forum to EXCLUDE you from the forum.
|
|
|
| |
