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1. A ferry can travel twice as fast when empty as when it is full. It travels 20 miles with full load, spends 1 hours for unloading & returns to its original port empty. It took 11 hours to complete the journey. What is the speed when the ferry is empty?
- A. 5
- B. 5
- C. 5
- D. 5
Answer: Option D
Explanation:
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