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OpenStudy (anonymous):
a boat cross a river with velocity 8 km/h. if the resulting velocity of boat is 10 km/h then the velocity of river
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OpenStudy (anonymous):
\[10^2 = 8^2+v_{river}^2\] \[100 - 64 = v_{river}^2\] \[6^2 = v_{river}^2\] \[v_{river} = 6\]
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