Em đang cần làm 1 chiếc xe kéo. Nó kéo theo chiếc xe khác tải khoảng 200Kg. Trọng lượng của 2 chiếc xe nữa tầm khoảng 50- 60 Kg.
Anh chị nào biết được cách tính thì giúp em với ạ






Anh chị nào biết được cách tính thì giúp em với ạ






