SOLUTION: A crew of 6 men can complete the construction of an office in 60 days. In order to speed up the job the contractor increases the size of the crew by 1/3. How many days will he save

Question 5738: A crew of 6 men can complete the construction of an office in 60 days. In order to speed up the job the contractor increases the size of the crew by 1/3. How many days will he save by the addition of these men?
Answer by Abbey(339) (Show Source): You can put this solution on YOUR website!
if the crew can do the job in 60 days, then each day, 1/60th of the job is complete.
each of the 6 men are performing 1/6th of the 1/60th of the work, or 1/360th of the work.
so if the crew is increased by 2 men (1/3 of 6 = 2), they are collectively performing 8/360th of the work.
if we divide 360 by 8, the result is 45 days.
The original construction was going to take 60 days, now it will take 45 days, so the amount of time saved will be 60-45 or 15 days.
RELATED QUESTIONS
5 men are hired to complete a certain job. if an additional men is hired, the job can be... (answered by ikleyn)

an electrical contractor is planning to complete a lighting job by useing two separate... (answered by richwmiller)

Twenty men did 1/4 of a job in eight days. Then it became necessay to complete the job... (answered by ankor@dixie-net.com)

A certain job has been estimated to take 10 men 5days. On day 4, half of the job has been (answered by palanisamy)

A 3-men crew can do a certain job in 3 weeks and 2 days, if we are to hire 4 men crew... (answered by josmiceli)

A crew of 6 can complete a job in 8 hours. How many hours would it take a group of 4 to... (answered by rfer,vleith)

Twenty men did 1/4 of a job in 8 days. Then, because of an emergency, it became necessary (answered by ankor@dixie-net.com)

5 men can complete a job in 4 days. How many days can 10 men working at 1/4 of the... (answered by josgarithmetic)

All members of a crew work at the same pace. If only 4 of them are working, they complete (answered by josgarithmetic)