The respective ratio between the time taken by a boat to tra

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The respective ratio between the time taken by a boat to tra - Exam Yatra

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The respective ratio between the time taken by a boat to travel the same distance downstream in stream A and that in stream B is 8 : 7. The speed of the boat is 12 km/h and the speed of stream A is half the speed of stream B. What is the speed of stream B ? (in km/h)

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