The natural gas $($methane$,$ density $($:$=0\mathrm{.}0415l\frac{b_m}{f}{t}^3\}$ and crude oil density $($:$=55l\frac{b_m}{f}{t}^3\}$ mixture having a density of $15\mathrm{.}8lb\frac{m}{f}{t}^3$ enters the separator at $A$ at $13f\frac{t^3}{s}.$ The process takes place at a constant temperature of $68F.$ Pure crude oil flows out through the pipe at $C$ at $1400ga\frac{l}{m}in.1f{t}^3=7\mathrm{.}48$gal. The average velocity of the pure natural gas that

leaves the $6-$in$-$diameter pipe at $D$ is $f\frac{t}{s}.$

Hint: Similar to class problem. Perform IOGA to determine mass flow rate in D$.$ Use density of natural gas and pipe diameter to calculate velocity

$1130$

$2620$

$4150$

$3400$