191  WorkRate1
2

Name : _________________

refresh

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



6 people can do a job in 12 days. How many days would it take if there were only 2 people?



6 people can do a job in 6 days. How many days would it take if there were only 2 people?



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



6 people can do a job in 10 days. How many days would it take if there were only 3 people?

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



6 people can do a job in 10 days. How many days would it take if there were only 3 people?



49 명의 일꾼들이 어떤일을 끝내는데 7 일이 걸린다. 만일 7 명의 일꾼들이 하면 며칠 걸려 끝내겠는가?



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



10 people can do a job in 12 days. How many days would it take if there were only 5 people?

+(         )

(         )+

++[[          ]]++