7 builders built 7 cabins in 7 days. How many builders can build 100 cabins in 50 days?

Question

7 builders

7 days

7cabins

Answer 1

7 builders 7 cabins 7 days

1 builder 1 cabin 1 day (the average work rate)

2 builders 2 cabins 1 day (double the workforce to build 2 cabins in 1 day)

So I need 2 builders to work 50 days to build 100 cabins

 

 

 

Answer 2

Hmmm...

 

it seems to me that if 7 builders can do 7 cabins in 7 days,

 

those same 7 builders could only do 1 cabin if they only had one day.

 

One cabin/day would yield just 50 cabins in 50 days.

 

So if you needed 100 cabins in 50 days, that would be 2 cabins per day. You need to double your workforce.

 

If 7 can build 1 per day, then you'd need 14 to build 2 per day.

 

At the end of the 50 days, you'd have 100 cabins built by 14 builders.

 

:-)

 

Matt