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1. A train traveled on an average speed of 45 km per hour from Dhaka to Chittagong and returned Dhaka from chittagong on an average speed of 36 km per hour. What was the average speed of the train over the whole journey?

  • A. 38 Km. 500 m.
  • B. 38 Km. 500 m.
  • C. 38 Km. 500 m.
  • D. 38 Km. 500 m.

Answer: Option D

Explanation:

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