The town of Hillsville has a triangular walking trail, as shown on the left. Perry wants to construct a similar trail in his town, but he has only enough space for a base of
yards.

An image shows two similar triangles. The first triangle has base 400 yards and two legs of 300 yards each. The second triangle has base 280 yards and two legs labeled N.

The length n of each of the other two sides of Perry's trail will be blank yards