Water flowing in a smooth 6-cm-diameter pipe enters a venturi contraction with a throat diameter of 4 cm. Upstream pressure is 120 kPa. If the pressure in the throat is 50 kPa, what is the flow rate, assuming ideal frictionless flow?
(a) 7.5 gal/min,
(b) 236 gal/min,
(c) 263 gal/min,
(d) 745 gal/min,
(e) 1053 gal/min
