Water Pressurized to 4 × 10⁵ Pa Is Flowing at 5.0

Multiple Choice

Water pressurized to 4 × 10⁵ Pa is flowing at 5.0 m/s in a pipe which contracts to 1/3 of its former area.What are the pressure and speed of the water after the contraction? (density of water = 1 × 10³ kg/m³)

A) 2 × 10⁵ Pa,15 m/s
B) 3 × 10⁵ Pa,10 m/s
C) 3 × 10⁵ Pa,15 m/s
D) 4 × 10⁵ Pa,1.5 m/s