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A cube of 60 mm edge drawn as an isometric drawing has edges measuring

  • A.60 mm
  • B.49 mm
  • C.73.5 mm
  • D.42.4 mm

Answer: A

Correct answer: 60 mm

An isometric *drawing* is set out with true lengths along the isometric axes, so a 60 mm edge is drawn 60 mm. That is the whole convenience of the method: the given dimensions are used directly with no scale conversion. The result is about 22 per cent larger than the true projection would be, which is accepted because the shape and proportions are identical.

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