Water at 7O O F is flowing in a 4-in. ID pipeline and is being metered by an orifice meter where b = 0.6. Calculate the flow rate in gallons per minute if the p across the orifice is 26 in. of...

Water at 7O^OF is flowing in a 4-in. ID pipeline and is being metered by an orifice meter where b = 0.6. Calculate the flow rate in gallons per minute if the
p across the orifice is 26 in. of manometer fluid where the manometer fluid has a specific gravity of 1.6. Justify your assumption on C_O, the discharge coefficient.