Answer:
12 walls
Step-by-step explanation:
Let's take everyone paints a different wall and there are no overlaps.
Given information from the question:
1.5 hours = 1 wall
1 hour =
[tex] \frac{1}{1.5} \\ = \frac{2}{3} walls[/tex]
per person.
From the information above, we can deduce:
6 people =
[tex] \frac{2}{3} \times 6 \\ = \frac{12}{3} \\ = 4 \: walls[/tex]
Since we know 6 people can paint 4 walls in an hour,
3 hours =
[tex]3 \times 4 \\ = 12 \: walls[/tex]
