Question

You have moved into a new house and your friends have come over to help paint the walls. Everyone paints at the same rate of 1.5 hours/wall.

QUESTION: If there are six people painting on Saturday, how many walls could you get painted in 3 hours?


walls

Answer 1

12 walls

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 =

`(1)/(1.5) \\ = (2)/(3) walls`

per person.

From the information above, we can deduce:

6 people =

`(2)/(3) * 6 \\ = (12)/(3) \\ = 4 \: walls`

Since we know 6 people can paint 4 walls in an hour,

3 hours =

`3 * 4 \\ = 12 \: walls`