SOLUTION: The number of persons needed to do a job varies directly as the amount of work to be done and inversely as the time in which the job must be done.If 3 people can mow 300m squared o

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Question 451567: The number of persons needed to do a job varies directly as the amount of work to be done and inversely as the time in which the job must be done.If 3 people can mow 300m squared of grass is 0.5 h , how long will it take 7 people to mow 7000m squared of grass?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
300m/3 people=100m/person per 1/2 hour or 200m/person per hour.
7000m/(7 people x 200m/person per hour)=7000/1400=5 hours..