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Question
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is
Options:
A .  22.5 m/sec.
B .  33 m/sec.
C .  40 m/sec.
D .  90 m/sec.
Answer: Option C

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