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L = P x L
L = 12 x 28
L = 336m²
A. = 672 pohon
B. 336 - 1 = 335m
= 670 pohon
= 2 ( 28 +12)
=80 m =8.000 cm
a.banyak pohon jagung= 8.000/ 50 cm= 160 buah
b.banyak pohon jagung jika 1 meter tidak di tanami= 8.000 cm - 100 cm
= 7.900 cm
=7.900/ 50= 158 buah
maaf kalo jawabannya salah