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Verified answer
Mapel : MatematikaKelas : VII SMP
Bab : Perbandingan
Pembahasan :
Hari | Pekerja | Hasil kali
90 | 40 | 3600
30 | 40 | 1200
48 | 40 + x | 48(40 + x)
3600 - 1200 = 48(40 + x)
2400 = 1920 + 48x
48x = 480
x = 10 tambahan pekerja
Verified answer
90 - 30 + 12 = 72 hari(90×40)/72
= 3600/72
= 50 orang
pekerja tambahan
= 50 - 40
= 10 orang
Jadi pekerja yg harus ditambahkan sebanyak 10 orang (C)