Tolong jawab ya kak, pakai caranya, Terimakasih​

L tanah = L bangunan + L taman + 3 L kolam
0,75 ha = 5 dam² + 280 da + 3 L kolam
75 dam² = 5 dam² + 28 dam² + 3 L kolam
75 = 5 + 28 + 3 L kolam
75 = 33 + 3 L kolam
42 = 3 L kolam
L kolam = 14 dam²
L kolam = 1400 m² (A)