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A plain scale of representative fraction 1/25 000 reading kilometres and hectometres to a maximum of 6 km must be

  • A.6 cm long
  • B.60 cm long
  • C.2.4 cm long
  • D.24 cm long

Answer: D

Correct answer: 24 cm long

\[ 6\ \mathrm{km} = 600\,000\ \mathrm{cm}, \qquad \frac{600\,000}{25\,000} = 24\ \mathrm{cm}. \] The scale is then divided into six main divisions of one kilometre each, and the first of those is subdivided into ten to read hectometres, with the zero placed at its right-hand end.

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