SOLUTION: If 4 men can do the job in 9 days,how many men were needed to do the job in 12 days?

Algebra.Com
Question 505011: If 4 men can do the job in 9 days,how many men were needed to do the job in 12 days?
Answer by Edwin McCravy(20081)   (Show Source): You can put this solution on YOUR website!
If 4 men can do the job in 9 days,how many men were needed to do the job in 12 days?
Since 4 men can do the job in 9 days, then it would take 1 man 4 times as long or 36 days.

12 days is 3 times as fast as the 36 days it would take 1 man, so it will take
3 men.

---------------------------------

Or you can use the formula

W1*T1     W2*T2 
-----  =  -----   
 J1        J2

where 
W1 = number of workers in the first ssituation = 4
T1 = number of days in the first situation = 9
J1 = number of jobs in the first situation = 1

W2 = number of workers in the second ssituation = ?
T2 = number of days in the second situation = 12
J2 = number of jobs in the second situation = 1

4*9   W2*12
--- = -----
 1      1

 36 = 12W2

  3 = W2 

Edwin
RELATED QUESTIONS

12 men can do a job in 8 days. If after 5 days,they are joined by 4 more men, how many... (answered by ankor@dixie-net.com)
3 men can do the job of 4 women. If 3 men can do a job in 8 days, in how many days can 5... (answered by richwmiller)
if 3 men can repair the house in 20 days,how many days can 5 men do the same... (answered by ankor@dixie-net.com)
Jose can do a certain job in 10 days, and Roy can do the same job in 12 days. If two men... (answered by ikleyn,Alan3354,greenestamps)
Sixty-Four men do a job in 15 days. How many more men will it take to do the job in 12... (answered by josgarithmetic,MathTherapy)
If it takes 6 men to do a job in 4 days how many days will it take 2... (answered by oscargut)
A certain number of men can complete a job in 10 days. if 10 man are absent, the... (answered by josmiceli)
URGENT HELP NEEDED!! if 2 men OR 3 women OR 6 children can do a job in 50 days, how... (answered by josgarithmetic)
eight men can complete a job in 25 days. how many men will be needed to complete the job... (answered by psbhowmick)