A Pressurized Cylindrical Tank, 5 $0.080 \mathrm {~m} ^ { 2 }$

A pressurized cylindrical tank, 5.0 m in diameter, contains water that emerges from the pipe at point C with a speed of 13 m/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 $0.040 \mathrm {~m} ^ { 2 }$ at point C. Assume that the water is an ideal fluid in laminar flow. The density of water is $1000 \mathrm {~kg} / \mathrm { m } ^ { 3 }$
The mass flow rate in the pipe is closest to

A) 420 Kg/s
B) 470 Kg/s
C) 520 Kg/s
D) 310 Kg/s
E) 360 Kg/s

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