The pressures of water in a water pipe when the tap is closed and open are respectively 3.5 x 10⁵ N/m² and 3 x 10⁵ N/m². The velocity of water flowing through the pipe when the tap is open is:

• A

  10 m/s

• B

  0.5 x 10⁶ m/s

• C

  $\frac{3.5\times {10}^6}{3\times {10}^5}\mathrm{m}/\mathrm{s}$

• D

  $\frac{3\times {10}^5}{3.5\times {10}^6}\mathrm{m}/\mathrm{s}$