A fast train takes one hour less than a slow train for a journey of \( 200 \mathrm{~km} \). If t...

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A fast train takes one hour less than a slow train for a journey of \( 200 \mathrm{~km} \). If the speed of the slow train is \( 10 \mathrm{~km} / \mathrm{hr} \) less than that of the fast train, find the speed of the two trains.
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