Water, Which We Can Treat as Ideal and Incompressible, Flows $3.0 \times 10 ^ { 4 } \mathrm {~Pa}$

Multiple Choice

Water, which we can treat as ideal and incompressible, flows at 12 m/s in a horizontal pipe with a pressure of $3.0 \times 10 ^ { 4 } \mathrm {~Pa}$
If the pipe widens to twice its original radius, what is the pressure in the wider section?

A) $9.8 \times 10 ^ { 4 } \mathrm {~Pa}$
B) $4.9 \times 10 ^ { 4 } \mathrm {~Pa}$
C) $7.4 \times 10 ^ { 4 } \mathrm {~Pa}$
D) $3.0 \times 10 ^ { 4 } \mathrm {~Pa}$