bài này có nhiều cách lắm. mình giải cách đơn giản nhất nhé
15 công nhân đjinh lắp xong trong số giờ là
20x8=160 giờ
số người sau khi bổ sung là
15+5=20 người
20 người lắp xong sau số giờ là
15x160:20=120 giờ
vậy 20 người lắp xong trong số ngày là
120:10=12 ngày
12 ngày bạn nhé ! đúng 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
mình làm rồi là 12 ngày bạn ạ , nha mình sẽ tích cho những ai cảm ơn ^^
12 ngay nhe dung 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
12 ngày bạn nhé !đúng
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%