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Applying Naismith's rule, allowing one hour for every 5 km and an extra 30 minutes for every 300 m of ascent, how long should a 10 km walk with 600 m of climb take?

  • A.2 hours 30 minutes
  • B.4 hours
  • C.3 hours
  • D.2 hours

Answer: C

Ten kilometres gives two hours and 600 metres of ascent adds two half-hours, making three hours in all. The rule takes no account of the ground underfoot or of the walker's fitness, so rough terrain and heavy loads both need a further allowance on top.

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