A man travel in his yacht downstream at d knots and returns the same distance upstream at u knots. What is his average rate for the round trip if the length of stream is 1:

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A man travel in his yacht downstream at d knots and returns the same distance upstream at u knots. What is his average rate for the round trip if the length of stream is 1:

1.du/21

2.dtu/21

3.Idu/(d+2)

4.2du/(d+u)

Posted Date:-2021-09-20 02:45:14

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