Water at 7O o F is flowing in a 3-in. ID pipeline and is being metered by an orifice meter where b = 0.5. Calculate the flow rate in gallons per minute if the p across the orifice is 28 in. of...

Water at 7O^oF is flowing in a 3-in. ID pipeline and is being metered by an orifice meter where b = 0.5. Calculate the flow rate in gallons per minute if the
p across the orifice is 28 in. of manometer fluid where the manometer fluid has a specific gravity of 1.7. Justify your assumption on C_O, the orifice discharge coefficient.