Answer
2$\frac{1}{12}$
Work Step by Step
three truckloads of firewood contains =$\frac{2}{3}$ , $\frac{3}{4}$ , and $\frac{2}{3}$ of a cord
Total cords of wirewood she burnt = $\frac{2}{3}$ +$\frac{3}{4}$ + $\frac{2}{3}$
=$\frac{2}{3}\times$ $\frac{4}{4}$ + $\frac{3}{4}\times$ $\frac{3}{3}$ + $\frac{2}{3}\times$ $\frac{4}{4}$
= $\frac{8}{12}$ + $\frac{9}{12}$ + $\frac{8}{12}$
=$\frac{25}{12}$
=2$\frac{1}{12}$
