1x225, 3x75, 5x45, 9x25, 15x15
1 nickel = 5 cents so now you have to multiply 5x45 ( that will be your answer)
The maximum area possible using 100 feet of fencing is that inside a circular fence. But, since you asked about a rectangular fence: a 25x25 fence would hold 625 square feet. a 10x40 fence would hold 400 square feet. a 5x45 fence would hold 225 square feet. As you can see, the square is the rectangle that encompasses the largest area, as it is closest to a circle.