At what velocity does water emerge from an orifice in a tank in which gauge pressure is
3×10⁵Nm⁻² before the flow starts? (Take the density of water= 1000 kg m⁻³.)

A. 14.5ms⁻¹
B. 24.5ms⁻¹
C. 34.5ms⁻¹
D. 44.5ms⁻¹