Question 141101
2 more bulldozers shortens an 8 day job to a 7 day job


this means that the 2 extra bulldozers do 1/8 of the job in 7 days


14 bulldozer-days (like man-hours) to do 1/8 of the job, so 112 (8*14) bulldozer-days to do the whole job


with only one bulldozer, it will take 112 days (16 weeks) to do the job