A leakage begins in water tank at position P as shown in the figure. The initial gauge pressure (pressure above that of the atmosphere) at P was 5 x 105 N/m2. If the density of water is 1000 kg/m3 the initial velocity with which water gushes out is
(a) 3.2 m/s
(b) 32 m/s
(c) 28 m/s
(d) 2.8 m/s
