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After 1h, two trains have gone \(650-585=65\) (km), or total speed of two train is \(65\) (km/h)
We set the speed of the first train is \(x\) km/h \(0< x< 65\). Then the speed of the second train is \(65-x\) (km/h).
According to the topic, we have:
The first train took \(4h30'+8h=12h30'=12,5h\) to meet the second one.
The second train took \(8h\) to meet the first one.
Infer, we have:
The first train distance is \(12,5x\) (km) and the second train distance is \(8\left(65-x\right)\) (km)
Conclude, we have an equation:
\(12,5x+8\left(65-x\right)=650\\ \Leftrightarrow12,5x+520-8x=650\\ \Leftrightarrow4,5x=130\\ \Leftrightarrow x=\dfrac{260}{9}\approx28,9\) (satisfied)
So the speed of the first train is 28,9(km/h), and the second is 36,1 (km/h)
(tiếng Anh về toán mình còn kém lắm, nếu có gì sai sót mong mọi người chỉ giáo nha
)
Chúc bạn học tốt nha
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