Soerang penggali sumur, setiap 2 setengah jam dapat menggali sedalam 2 2 per 3 meter. Berapa dalam sumur tergali, jika penggali bekerja 1 per 2 jam
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Penjelasan dengan langkah-langkah:
Cara 1 :
2 2/3 : 2 1/2
= 8/3 : 5/2
= 8/3 × 2/5
= 16/15 per 1/2 jam
16/15 × 1/2
= 16/30
= 8/15 m ✔
Cara 2 :
1/2 jam = 30 menit
2 1/2 jam = 150 menit
30/150 × 2 2/3
= 30/150 × 8/3
= 240/450
= 24/45
= 8/15 m ✔
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