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ISRO2009-2

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If the stream function is given by $\Psi=3xy$, then the velocity at a point $(2,3)$ will be

  1. $7.21 \: \text{unit}$
  2. $18 \: \text{unit}$
  3. $10.82 \: \text{unit}$
  4. $54 \: \text{unit}$
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