Two trains, each of length \( 100 \mathrm{~m} \), are running on parallel tracks. One overtakes ...

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Two trains, each of length \( 100 \mathrm{~m} \), are running on parallel tracks. One overtakes the other in \( 20 \mathrm{~s} \) and one crosses the other in \( 10 \mathrm{~s} \). Calculate the speed of each of the trains.
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