SOLUTION: If 10 men working 8 hours a day take 15 days to complete a job.How long will it take 20 men working 6 hours a day to complete the job?
B) If the two groups are combined how long
Algebra.Com
Question 505173: If 10 men working 8 hours a day take 15 days to complete a job.How long will it take 20 men working 6 hours a day to complete the job?
B) If the two groups are combined how long will it take the new team to complete the same job if they work 10 hours a day?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
If 10 men working 8 hours a day take 15 days to complete a job.How long will it take 20 men working 6 hours a day to complete the job?
B) If the two groups are combined how long will it take the new team to complete the same job if they work 10 hours a day?
**
first group takes 15 days to complete the job working 8 hrs/day
working 10 hrs/day, first group takes (8/10)*15=12 days to complete the job
Work rate of first group=1/12 working 10 hrs/day
..
10/20*8/6*15=12 days second group takes to complete the job working 6 hrs/day
working 10 hrs/day, second group takes (6/10)*15=9 days to complete the job
Work rate of second group=1/9 working 10 hrs/day
..
let x=days groups working together can complete the job
1/x = team work rate
sum of individual group work rates=work rate working together
1/12+1/9=1/x
x/12+x/9=1
LCD:36
4x+3x=36
7x=36
x=36/7
x=5-1/7 days
RELATED QUESTIONS
25 men take 20 days working 8hours a day to complete a job.how many days will 15 men take (answered by ptaylor)
It takes 10 days for 4 men working 6 hours a day to complete some work. How many days... (answered by josgarithmetic)
Thirty men take 20 days to complete a job working 9 hours a day. How
many hours a day... (answered by ankor@dixie-net.com)
10 men working for 5 hours a day for 6 days mow an area of 5 acres. If there are 8 men... (answered by josmiceli)
Ten men working six hours a day takes 12 days to complete the job.How long will it take... (answered by josgarithmetic)
if 4 painters complete a painting job in 15 days working hours per day, how long would it (answered by ankor@dixie-net.com)
15 men working 7 hours a day can finish a piece of work in 15 days. How many days will... (answered by ankor@dixie-net.com)
If 54 men working 10 hours a day can finish a work job in 15 days, how many men are... (answered by Alan3354)
If 12 men mow a field of 40 acres in 8 days working 10 hours a day how many days will it... (answered by ankor@dixie-net.com,stanbon)