Reading of mercury level in the closed-end arm of a manometer is \( 100 \mathrm{~mm} \) and in t...

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Reading of mercury level in the closed-end arm of a manometer is \( 100 \mathrm{~mm} \) and in the arm attached to the system is \( 70 \mathrm{~mm} \). What is the pressure of the system.
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