Length of square site 74m, width of 28 m na1/4chast to a posadiliredk, on remained 1/6 potato. area free area?

53
74*28 = 2072 sq.m. - land area. 2072:4 = 518 sq.m. are occupied with radish. (2072-518): 6 = 1554:6 = 259 sq.m. are occupied with potato. 2072-518-259 = 1295 sq.m. are free.
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