Answer:
The correct option is C. 9 houses could 18 men paint in 6 hours.
Step by step explanation:
Let the number of houses paint by 18 men in 6 hours be x.
One man can paint one house in 12 hours.
The part of house painted by a man in 1 hour is [tex]\frac{1}{12}[/tex].
The part of house painted by a man in 6 hour is
[tex]\frac{6}{12}=\frac{1}{2}[/tex]
The total number of men is 18. Therefore the number of houses painted by 18 men is
[tex]x=\frac{1}{2}\times 18=9[/tex]
Therefore correct option is C. 9 houses could 18 men paint in 6 hours.
