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      Question

      A person is to reach a destination 40 km away. If he

      covers the first 25 km in 4 hours then at what constant speed should he go so that the average speed for the whole journey becomes 8 km/hour?
      A 12 km/hour Correct Answer Incorrect Answer
      B 13 km/hour Correct Answer Incorrect Answer
      C 14 km/hour Correct Answer Incorrect Answer
      D 15 km/hour Correct Answer Incorrect Answer

      Solution

      ATQ, Therefore, the person should maintain a constant speed of 15 km/hour for the remaining distance to achieve an average speed of 8 km/hour for the whole journey.

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