551  WorkRate1
2

Name : _________________

refresh

15 people can do a job in 8 days. How many days would it take if there were only 5 people?



15 people can do a job in 10 days. How many days would it take if there were only 5 people?



49 people can do a job in 10 days. How many days would it take if there were only 7 people?



12 people can do a job in 6 days. How many days would it take if there were only 6 people?



40 people can do a job in 6 days. How many days would it take if there were only 8 people?

21 people can do a job in 12 days. How many days would it take if there were only 7 people?



18 people can do a job in 8 days. How many days would it take if there were only 6 people?



14 명의 일꾼들이 어떤일을 끝내는데 5 일이 걸린다. 만일 2 명의 일꾼들이 하면 며칠 걸려 끝내겠는가?



24 people can do a job in 9 days. How many days would it take if there were only 4 people?



12 people can do a job in 6 days. How many days would it take if there were only 4 people?

+(         )

(         )+

++[[          ]]++