The actual velocity for mouthpiece is found to be 9 m/s and the coefficient of velocity is 0.855, then the theoretical velocity for mouthpiece will be
1). 7.70 m/s
2). 15.4 m/s
3). 10.5 m/s
4). 5.25 m/s
Coefficient of velocity for mouthpiece, $({C_v} = \frac{{Actual\;velocity}}{{Theoretical\;velocity}})$
Therefore,
$(Theoretical\;velocity = \frac{{Actual\;velocity}}{{{C_v}}})$
$(Theoretical\;velocity = \frac{{9.0\;m/s}}{{0.855}})$
Theoretical velocity = 10.5 m/s
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