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      Question

      A bus moves from station M to station N at 52 km/h and

      returns at 65 km/h. Calculate the approximate average speed of the bus for the complete journey.
      A 57.8 km Correct Answer Incorrect Answer
      B 36.2 km Correct Answer Incorrect Answer
      C 95.7 km Correct Answer Incorrect Answer
      D 78.8 km Correct Answer Incorrect Answer

      Solution

      ATQ,

      Average speed = (2 × 52 × 65) ÷ (52 + 65) = 6760 ÷ 117 ≈ 57.8 km/h

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