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Mathematics, 09.08.2021 14:00 heavyhearttim
một con thuyền bị dòng nước đẩy đi một góc 80 độ so với bờ sông. vì vậy, con thuyền phải đi mất 20’ mới sang được bờ bên kia biết vận tốc của con thuyền là 12km/h. tính chiều rộng của khúc sông
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một con thuyền bị dòng nước đẩy đi một góc 80 độ so với bờ sông. vì vậy, con thuyền phải đi mất 20’...
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