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A conventional design closes at \( 90 \) t while an unconventional one is estimated at \( 82 \) t with an uncertainty of \( \pm 12 \) per cent. The upper bound is

  • A.82 t
  • B.72.2 t
  • C.100 t
  • D.91.8 t

Answer: D

Computing \( 82 \times 1.12 = 91.8 \) t, which exceeds the conventional design's estimate. The advantage is real at the central estimate but is not established once the uncertainty is carried, which is exactly the difficulty such configurations face.

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