Question: An aircraft is reported to be cruising in still air at -20C and 40 kPa at a Mach number of 0.86. The velocity of the

An aircraft is reported to be cruising in still air at -20°C and 40 kPa at a Mach number of 0.86. The velocity of the aircraft is
(a) 91 m/s
(b) 220 m/s
(c) 186 m/s
(d) 280 m/s
(e) 378 m/s

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