Answer
0.75 $m^{2}/s $
Work Step by Step
d
= $\frac{a^{3}}{cb^{2}}$
= $\frac{a^{3}}{c} \times \frac{1}{b^{2}}$
= $\frac{(9.7m)^{3}}{69\; m/s} \times \frac{1}{(4.2s)^{2}}$
= $912.673 m^{3} \times \frac{1\; s}{69\; m} \times \frac{1}{17.64\; s^{2}} $
$\approx$ 0.75 $m^{2}/s $
