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      Question

      A truck covers the distance from Depot A to Depot B at 30

      km/h and returns at 45 km/h. Find its average speed.
      A 54 km Correct Answer Incorrect Answer
      B 36 km Correct Answer Incorrect Answer
      C 65 km Correct Answer Incorrect Answer
      D 78 km Correct Answer Incorrect Answer

      Solution

      ATQ,

      Average speed = (2 × 30 × 45) ÷ (30 + 45) = 2700 ÷ 75 = 36 km/h

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