A Pressurized Cylindrical Tank,5 $84 \mathrm {~m} / \mathrm { s }$

question 12

Multiple Choice

A pressurized cylindrical tank,5.0 m in diameter,contains water that emerges from the pipe at point C with a speed of $84 \mathrm {~m} / \mathrm { s }$ as shown in the figure.Point A is 10 m above point B and point C is 3.0 m above point B.The area of the pipe at point B is $0.080 \mathrm {~m} ^ { 2 }$ and the pipe narrows to an area of $0.070 \mathrm {~m} ^ { 2 }$ at point C.Assume that the water is an ideal fluid in laminar flow.The density of water is 1000 kg/m³.The rate at which the water level is falling in the tank is closest to

• A)300 mm/s.
• B)340 mm/s.
• C)250 mm/s.
• D)210 mm/s.
• E)160 mm/s.

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