
#1
September 4th, 2019,
16:45
There may be a simple way of answering this but I'm stumped! it takes 10 people 6 days to decorate a house. how long will it take 4 people?
Any help appreciated

September 4th, 2019 16:45
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#2
September 4th, 2019,
20:31
Ever heard the term "manhours" to complete a job? This is very similar in units, except it's "peopledays" ...
1 house decorated by 10 people in 6 days means it takes 60 peopledays (same as 60 days for 1 person to finish decorating the house)
(60 peopledays to finish a house)/(4 people working) = 15 days to finish

#3
September 5th, 2019,
03:10
Thread Author
Originally Posted by
skeeter
Ever heard the term "manhours" to complete a job? This is very similar in units, except it's "peopledays" ...
1 house decorated by 10 people in 6 days means it takes 60 peopledays (same as 60 days for 1 person to finish decorating the house)
(60 peopledays to finish a house)/(4 people working) = 15 days to finish
Thanks for this Skeeter. So the calculation is people X days (in the original calculation) then divide by however number of people are in the question?

#4
February 10th, 2020,
08:20
The more people you have the less time it will take. This is an "inverse" proportion. You have 4/10= 2/5 as many people so it will take 10/4= 5/2 as long.
(Also, this is assuming that each person works at the same rate no matter how many people there are. If "decorating" involved lifting some object so heavy it takes 5 people to lift it, 4 could never finish!)