Since the HCF of 24 and 56 is 8, the side of the identical square plots must be one of the factors of 8. The factors of 8 are 1,2,4 and 8 If side of the square plot is 1 m, the length of fencing material required is (25 × 56 + 57 × 24) = 2768 m But 2768 m > 2700 m. If side of the square plot is 2 m, the length of fencing material required is (29 x 24 +13 x 56) = 1464 m < 2600 m ∴ For minimum fencing material to be left the side of identical square plot = 2m.