Answer :

[tex]\begin{array}{ccc}\frac{2}{3}&-&6min\\\\5&-&xmin\end{array}\\\\\\cross\ multiply\\\\\frac{2}{3}x=5\cdot6\\\\\frac{2}{3}x=30\ \ \ \ /\cdot\frac{3}{2}\\\\x=15\cdot3\\\\x=45\ (min)\leftarrow answer[/tex]

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