775  WorkRate1
2

Name : _________________

refresh

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



30 people can do a job in 9 days. How many days would it take if there were only 6 people?



24 people can do a job in 7 days. How many days would it take if there were only 8 people?



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



63 people can do a job in 5 days. How many days would it take if there were only 9 people?

4 people can do a job in 8 days. How many days would it take if there were only 2 people?



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



30 명의 일꾼들이 어떤일을 끝내는데 11 일이 걸린다. 만일 6 명의 일꾼들이 하면 며칠 걸려 끝내겠는가?



28 people can do a job in 5 days. How many days would it take if there were only 7 people?



10 people can do a job in 8 days. How many days would it take if there were only 2 people?

+(         )

(         )+

++[[          ]]++