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1/4+3/2+2/1=15/4=3 ¾
ll20. pekerja yang dibutuhkan: 16×35:20=560:20=28 orang (D)
21. 12 m (b). karena setiap panjang di peta 1,5 = 12 m
22. (35/8x1000+3970) - 245 = 8345-245 = 8100 m.
Semoga bermanfaat ❤