Michelle is building a rectangular landing strip for airplanes .she has material to cover 1/1,500 of a square mile. the landing strip must be 1/6 of a mile long. with the amount of material that has , what is the greatest possible width the land strip, in miles?

I think that the missing word here is:
"with the amount of the material that Michelle has"

Let's say that her landing strip is x miles long, then its area would be:



We also know how big it is:



now, let's multiply both sides by 6:




So the answer is that it would be miles wide