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= 22/7 x 21
= 66 m
banyak pohon = 66 / 3
= 22 pohon
#semoga bermanfaat
Jawab :
K = π . d
K = 22/7 . 21
K = 66 cm
Banyak pohon yang dibutuhkan = 66 : 3 = 22 buah