15 masons can build the wall in 20 days. How many masons will build the wall in 12 days?
- 15 days
- 12 days
- 23 days
- None
Explanation
The rate at which Masons build walls is what we need to understand with this problem.
15*X = 20
15*X/20 = 1 Wall
Therefore, a fifteenth of a wall can be built by one mason in 20 days.
Each day, a mason can build 1/(15*20) or 1/300th of an entire wall.
Therefore, it would take one mason 300 days to build a wall on their own.
It would take 15 masons 20 days (300/20) to build a wall.
And we can estimate the 12 day solution with the following formula:
300/12 = 25
It would take 25 masons 12 days .
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