Luas kebun pak udin 17 dam2 di kebun tersebut di tanami ketela 750 ca jagung 7 are dan selebihnya utk kolam ikan adalah

17 dam² = 1700 m²
ketela = 750 ca = 7,5 are =750 m²
jagung = 7 are = 700 m²
kolam = 1700 – 750 – 700 = 250 m²

Kolam = 17 dam2-750ca-7are
= 1700 m2 – 750 m2 – 700 m2
= 250 m2 = 2,5 are