Final answer:
If 10 more chickens are added, the feed will last approximately 5.33 days.
Step-by-step explanation:
To solve this problem, we can use the concept of proportions. Let's set up a proportion to represent the relationship between the number of chickens and the number of days the feed will last:
(30 chickens)/(4 days) = (40 chickens)/x days
Cross-multiplying, we get:
30 * x = 4 * 40
Dividing both sides by 30, we find:
x = 160/30 = 16/3 = 5.33 days
Therefore, if 10 more chickens are added, the feed will last approximately 5.33 days.
Learn more about Calculating days of feed for chickens