Two streams merge to form a river. One stream has a width of \( 8.2 \mathrm{~m} \), depth of \( ...

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Two streams merge to form a river. One stream has a width of \( 8.2 \mathrm{~m} \), depth of \( 3.4 \mathrm{~m} \), and current speed of \( 2.3 \mathrm{~m} / \mathrm{s} \). The other stream is \( 6.8 \mathrm{~m} \) wide and \( 3.2 \mathrm{~m} \) deep, and flows at \( 2.6 \mathrm{~m} / \mathrm{s} \). If the river has width \( 10.5 \mathrm{~m} \) and depth \( 4.5 \mathrm{~m} \), what is its speed?
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