Concept:A kilometre is equal to 1000 metres. To find a fraction of a quantity, multiply the fraction by the total value. Explanation:We need two‑fifths of a kilometre.First, note 1 km=1000 m.So, 52​ of a kilometre is 52​×1000 metres.Compute: 52×1000​=52000​=400 metres.Therefore, two‑fifths of a kilometre equals 400 metres. Answer:400 meter (Option B)