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Q: A takes 30 minutes more than B to cover a distance of 15 km at a certain speed, But if A doubles his speed, he takes one hour less than B to cover the same distance. What is the speed (in km/h) of B?
  • A. 5
  • B. 6
  • C.
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  • D.
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Correct Answer: Option B -
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Explanations:

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