SOLUTION: Four men take 3 hurs to paint a wall. How much time would 6 men take to do the same job? (Ans. 2 Hours)

Algebra.Com
Question 479081: Four men take 3 hurs to paint a wall. How much time would 6 men take to do the same job? (Ans. 2 Hours)
Found 2 solutions by robertb, Edwin McCravy:
Answer by robertb(5830)   (Show Source): You can put this solution on YOUR website!
1/12 = the part done by 1 man per 1 hour.
or, the work requires 12 man-hours to finish the wall.
Let x = # of hours to finish painting the wall
==> ==> 6x = 12 ==> x = 2 hours.
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
Four men take 3 hours to paint a wall. How much time would 6 men take to do the same job? (Ans. 2 Hours)

Do it in your head:

The least common multiple of 4 men and 6 men is 12 men.

>>Four men take 3 hours to paint a wall,...<<

12 men is 3 times as many men as 4 men, so they can paint the wall
3 times as fast, which means they can paint it in only 1 hour.

Now 6 men is only half as many men as 12 men, so it takes them twice 
as long as it takes 12 men.  So it takes 6 men 2 hours.

Edwin
RELATED QUESTIONS

4 men take 3 hours to paint a wall. how much time would 6 men take to do the same... (answered by josmiceli)
It takes Eddie 7 hours to paint a wall. Alison takes 4 hurs to do the same job. how long... (answered by scott8148,Alan3354)
17 men can paint a wall in 6 days. How long will 2 men take to paint the same... (answered by stanbon)
It takes 8 men to paint the outside of a house how long would it take 6 men to do the... (answered by josmiceli)
6 men take 2 days to paint a house. how long would 2 men take to do the painting ? (answered by htmentor,w_parminder)
It takes 8 men 3 days to paint the outside of a house how long does it take 6 men to do... (answered by Edwin McCravy)
If 3 men can do a job in 1 hour. How much time will it take 12 men to do the same... (answered by josgarithmetic)
It takes 3 men 6 hours to paint a house. How long would it take 2 men to paint the house? (answered by ewatrrr,josmiceli)
it takes 5 men 3 hours to do a job if 3 men do the same job how long will it take OK You (answered by ankor@dixie-net.com,Grinnell)