Example 19 : A boat goes 30 kmupstream and 44 km10 hours. In 13 hours, – InterviewSolution

1.	Example 19 : A boat goes 30 kmupstream and 44 km10 hours. In 13 hours, it can go40 km upstream and 55 kmdown-stream. Determine the speedof the stream and that of the boat instill waterdownstream in
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