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Q. A man can row $9 \frac{1}{3} \mathrm{~km} / \mathrm{h}$ in still water and finds that it takes him twice as much time to row up then as to row down the same distance in the river. Based on above information, answer the following questions.
The speed of the boat in downstream is

Time and Distance

Solution:

So, speed of boat in downstream
$ =\mathrm{b}+\mathrm{s} $
$ =\frac{28}{3}+\frac{14}{3}=\frac{42}{3}=14 \mathrm{~km} / \mathrm{h}$