Final answer:
Rebeca can paint 12 pickets per hour, and there are 144 pickets in her 72-foot fence with 2 pickets per foot. It will take her 12 hours to paint the entire fence.
Step-by-step explanation:
Rebeca can paint 12 pickets in one hour. To find out how long it will take her to paint the entire fence, we need to know the total number of pickets along the 72-foot fence. Since there are 2 pickets per foot, we multiply the fence length by the number of pickets per foot to get the total number of pickets:
- Total pickets = 72 feet × 2 pickets/foot = 144 pickets.
Now, we divide the total pickets by the number of pickets Rebeca can paint per hour:
- Time to paint = Total pickets / Pickets painted per hour = 144 pickets / 12 pickets/hour = 12 hours.
Therefore, it will take Rebeca 12 hours to paint the entire fence.