Question
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 7 : 5. The speed of the boat is 10 km/h and the speed of stream A is one third of the speed of stream B. What is the speed of stream B? (in km/h)Solution
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The speeds of two trains are in the ratio 7:9. If the first train travels 315 km in 3 hours, how far will the second train travel in 5 hours?
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