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Keliling : luas = s²
40.000 = s²
s = √ 40.000
s = 200 m
keliling = s . 4
= 200 . 4
= 800 m
2)jarak Anyer-Panarukan = 1.000 km
= 1.000.000 m
satu perempat jaraknya ditanami mangga dengan jarak 5 meter, maka
x = 50.000 pohon