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The Mach number of the flow will be

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asked in PPE by (215k points)
The stagnation temperature of an isentropic flow of air (k=1.4) is 400 K. if the temperature is 200K at a section, then the Mach number of the flow will be

(a) 1.046                      (b) 1.264

(c) 2.236                      (d) 3.211

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