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Two comparative scales drawn on the same baseline must have

  • A.the same smallest subdivision in each system
  • B.the same total length of construction
  • C.the same representative fraction
  • D.the same number of main divisions marked

Answer: C

Correct answer: the same representative fraction

This is what makes the comparison possible: both scales reduce the world by the same factor, so a given physical distance occupies the same length on the paper in both, and can be read off either. Their divisions and total lengths will differ, since the units differ, but the reduction must be identical.

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