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The wings of a 777 are swept back at __________ degrees for a cruise speed of Mach 0.83.

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The wings of a 777 are swept back at __________ degrees for a cruise speed of Mach 0.83.

(a) 316 degrees

(b) 31.6 degrees

(c) 0.316 degrees

(d) 3.16 degrees

This question was addressed to me in class test.

My question is taken from Boeing 777 Family of Aircraft’s topic in chapter Boeing Family Overview of Aircraft Maintenance

1 Answer

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The correct choice is (b) 31.6 degrees

Explanation: The wings of a 777 are swept back at 31.6 degrees, for a cruise speed of Mach 0.83. The cruise speed was revised up to Mach 0.84 after flight tests.

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