The rectangle below has an area of 15n^3+20n^7 square meters. the width of the rectangle (in meters) is equal to the greatest common monomial factor of 15n^3 and 20n^7. what is the length and width of he rectangle?

The area (A) of a rectangular polygon is the product of the width (W) and the length (L). That is,
                                       A = L x W

It is said in the problem that the width of the rectangle is the greatest common factor of 15n³ and 20n⁷ which is 5n³. We calculate for the length of the rectangle by dividing the given area by the width.
 
                                     Length = (15n³ + 20n⁷)/(5n³)
                                     Length = 3 + 4n⁴