SOLUTION: 12 men working 7 hours a day can finish a job in 6 days. How many more hours a day must 8 men work in order to finish the jon in 7 days? What would the equation be?

Question 475834: 12 men working 7 hours a day can finish a job in 6 days. How many more hours a day must 8 men work in order to finish the jon in 7 days?
What would the equation be?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
12 men working 7 hours a day can finish a job in 6 days.
How many more hours a day must 8 men work in order to finish the job in 7 days?
What would the equation be?
:
Find the number of man-hours required to do the job
12 * 7 * 6 = 504 man-hrs
:
Let m = no. of more hrs per day required for 8 men to do the job in 7 days
:
8 * (m+7) * 7 = 504
8(m+7) * 7 = 504
7(8m+56) = 504
56m + 382 = 504
56m = 112
m =
m = 2 more hrs a day required
:
:
See if this adds up
8 * 9 * 7 = 504, it does
RELATED QUESTIONS
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 6 men work 6 hours per day, they can finished a job in 6 days. how many days are... (answered by lwsshak3,josgarithmetic)

20 men working together can finish a job in 30 day. How many days can 12 men take? (answered by josmiceli)

A contractor agrees to lay a road 3000m long in 30 days. 50 men are employed and they... (answered by josgarithmetic,ikleyn)

ggreg working 8 hours a day can finish a piece of work in 16 days.how many hours per day... (answered by Cromlix)

10 men working 6 hours a day can complete a work in 18 days. How many hours a day must 15 (answered by vksarvepalli)

A contractor agrees to lay a road 3000m long in 30 days. 50 men are employed and they... (answered by josgarithmetic,MathTherapy)

100 men can finish a work in 100 days. Every day two men leaves the work. Then how many... (answered by Edwin McCravy)