Physics, 03.10.2021 15:40 jayleneeeee
Hai ô tô khởi hành cùng lúc từ A, B cách nhau 20 km chuyển động theo hướng từ A đến B vs vận tốc lần lượt là 60km/h và 40km/h
a, sau bao lâu 2 xe gặp nhau, vị trí gặp nhau cách A, b bao nhiêu km?
b, sau 30 phút kể từ khi xuất phát hai xe cách nhau bao nhiêu km?
GIÚP MIK VS LÍ LỚP 8
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