The SR-71 Blackbird, which is 107 feet 5 inches long, is theworld's fastest airplane. It can fly at three times the spped ofsound at altitudes of 80,000 ft. When it lands after a long flightit is too hot to be touched for about 30 minutes, and is 6.0 incheslonger than at takeoff. How hot is the Blackbird when it lands,assuming its coefficient of linear expansion is 24 x10-6K-1 and its temperature at takeoff is 23oC?

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