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      Question

      A girl walks to the park at 6 km/h and returns at 8 km/h.

      If she spends a total of 70 minutes for the whole trip, find the distance between her house and the park.
      A 4 km Correct Answer Incorrect Answer
      B 10 km Correct Answer Incorrect Answer
      C 8 km Correct Answer Incorrect Answer
      D 3 km Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the distance between her house and the park be ‘d’ km.

      ATQ,

      (d/6) + (d/8) = (70/60)

      Or, (4d/24) + (3d/24) = (7/6)

      Or, (7d/24) = (7/6)

      So, d = (24/6) = 4

      So, the distance between her house and the park = d = 4 km

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