SOLUTION: If 10 people can finish a job in 30 days, In how many the job can be completed by 30 persons?

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Question 658504: If 10 people can finish a job in 30 days, In how many the job can be completed by 30 persons?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
10/30=30/X CROSS MULTIPLY
30X=30*10
30X=300
X=300/30
X=10 DAYS TO COMPLETE THE JOB WITH 30 WORKERS.