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An aircraft has an operating empty weight of \( 45 \) t, payload of \( 20 \) t and fuel of \( 25 \) t. Its take-off weight is

  • A.45 t
  • B.90 t
  • C.65 t
  • D.70 t

Answer: B

Correct answer: 90 t

The take-off weight is the sum of the three:

\[ 45 + 20 + 25 = 90 \text{ t} \]

Operating empty weight covers the structure, systems, engines and crew; payload is what is being carried for revenue; and fuel is the third component. This simple addition is the constraint that generates the payload-range diagram, since the total is capped.

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