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A road measured with a thread is 24 cm long on a 1:50,000 map. How far is it on the ground?

  • A.12 km
  • B.1.2 km
  • C.120 km
  • D.24 km

Answer: A

Twenty-four centimetres at 50,000 times is 1,200,000 centimetres, which is 12 kilometres. Following the curves rather than measuring straight across is what makes the figure useful for planning a journey, since a vehicle must travel the road as it lies.

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