In the given figure, \( S \) and \( T \) are points on the sides \( P Q \) and \( P R \) respect...

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In the given figure, \( S \) and \( T \) are points on the sides \( P Q \) and \( P R \) respectively of \( \triangle P Q R \), such that
W \( P T=2 \mathrm{~cm}, T R=4 \mathrm{~cm} \) and \( S T \| Q R \). Find the ratio of the areas of \( \triangle P S T \) and \( \triangle P Q R \).
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