3.16 A rectangular tank that is open to the atmosphere is filled to a depth of 2.5 m. A U-tube manometer filled with Meriam blue manometer fluid (SG = 1.75) is connected to the tank 0.7 m above the tank bottom. Before the manometer is connected to the tank, the zero level is 0.2 m below the connection. Determine the deflection

ℓ after the manometer is connected.

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3 m 2.5 m 0.7 m P3.16 Zero level 0.2 m