tolong kak besok di kumpulin

a. L = 70650
1/4 × π × d² = 70650
1/4 × 3,14 × d² = 70650
3,14/4 × d² = 70650
d² = 70650 : 3,14/4
d² = 70650 × 4/3,14
d = √90000
d = 300 m

b. K = π × d
K = 3,14 × 300 m
K = 942 m

c. Banyak pohon yang ditanam
= 942 m : 6 m/batang
= 157 batang