Which of the following represents correct relation for pressure in manometer type level measuring system?

Question:Which of the following represents correct relation for pressure in manometer type level measuring system?

1. (ϱmhm – ϱy)g

2. (ϱm – ϱy)g

3. (ϱmhm – ϱ)g

4. ϱmhm – ϱy


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