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misal tinggi pohon = x
2 / x = 1,5 / 12
x = 16 m
32.
misal = PS = y
y / y+3 = 8 / 12
12y = 8y + 24
4y = 24
y = 6
t = 1200 x 200 / 150
t = 1600 cm = 16m.
2. PS/(PS+3) = 8/12
12PS = 8(PS+3)
12PS = 8PS +24
4PS = 24
PS = 6cm.