Hunter needs to make a square patch of land whose perimeter is twice as large as a rectangular patch of land. If the rectangular patch of land has a length of 400 feet and a width of 300 feet, calculate the length of one side of the square patch of land.
If the rectangular patch of land measures 400 feet by 300 feet, the total length around it or its perimeter is given by 2 * 400 + 2 * 300 = 800 + 600 = <<2*400+2*300=1400>>1400
The square patch's perimeter is double that length, so it's 1400 * 2 = <<1400*2=2800>>2800
Since the square has four equal sides, one side of the square patch of land will have a length of 2800/4 = <<2800/4=700>>700 feet
#### 700