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2022-10-23 10:14:35
S thửa ruộng là
40x30=1200 m2
số thóc thu hoạch được trên thửa ruộng là
(6:10)x1200= 720 kg
=7,2 tạ
2022-10-23 10:04:11
2022-10-23 09:59:01
chu vi sân chơi hình chữ nhật là
(100+80)*2=360 (m)
xung quanh sân chơi lắp số cột đèn là
360 : 5 =72 (cột)
chi phí để lắp 72 cột đèn là
1200000*72=86200000 (đồng)