1x225, 3x75, 5x45, 9x25, 15x15
75 yards.I got this answer because:There are 3 feet in one yard. So, I multiplied 3x75= 225 feet.
225=3x75=32x25=32x5x5=32x52 prime factors are 3 and 5.The proper prime factors of 225 are 3, 3, 5, 5.The proper prime factors of 225 are 3, 3, 5, 5.