A stream of air enters a $7\mathrm{.}50-cm$ ID pipe at a velocity of $30\mathrm{.}0\frac{m}{s}$ at $27\mathrm{.}0C$ and $1\mathrm{.}80$ bar $($gauge$).$

At a point downstrream, the air flows through a $5\mathrm{.}75-cm$ ID pipe at $60\mathrm{.}0C$ and $1\mathrm{.}43$ bar $($gauge$).$

What is the velocity of the gas at the downstream point?

$[$Assume all velocities are averages over the pipe cross section.$]$

i

$\frac{m}{s}$