Giải giúp mình với mn
----- Nội dung dịch tự động từ ảnh -----
Question 3. 15 people can complete a task in 4 hours. Assume everyone works at the
same rate:
1. How long will it take 1 person to complete the same task?
4
A. hour
B. 2 hours
C. 30 hours
D. 60 hours
15
2.
How long will it take 30 people to complete the same task?
A. 1 hour
B.
8 hours
C. 6 hours
D. 2 hours
3. How long will it take 12 people to complete the same task?
A.
3 hours
B. 5 hours
C. 9 hours
D. 2 hours