math
posted by Anonymous on .
Mr. smith wants to buy some fencing to completely surround his rectangular garden. He knows that the total perimeter of the garden is 26 meters and the total area is 40 square meters. What is the gardenâ€™s length and width?

Possible dimensions:
2 by 20
4 by 10
5 by 8
Which of those dimensions will give a perimeter of 26 meters?