# Question #2570f

$\frac{4 w \sqrt{5 w}}{3}$
80 does not have an exact square root, but it has factors which are perfect squares. $\sqrt{\frac{16 \times 5 \times {w}^{2} \times w}{9}} = \sqrt{\frac{{4}^{2} \times 5 \times {w}^{2} \times w}{3} ^ 2}$
= $\frac{4 w \sqrt{5 w}}{3}$