Т.к. s1 = s2 , тогда
= \frac{2 \times v1 \times v2}{v1 + v2} " alt=" < v > = \frac{2 \times v1 \times v2}{v1 + v2} " align="absmiddle" class="latex-formula">
= \frac{2 \times 2 \times 6}{2 + 6} = 3( \frac{km}{ch} )" alt=" < v > = \frac{2 \times 2 \times 6}{2 + 6} = 3( \frac{km}{ch} )" align="absmiddle" class="latex-formula">
ch - час