9.81.6 h\dfrac{9.8}{1.6} \mathrm{~h}1.69.8 h
1.69.8 h\sqrt{\dfrac{1.6}{9.8}} \mathrm{~h}9.81.6 h
9.81.6h\sqrt{\dfrac{9.8}{1.6}} h1.69.8h
1.69.8 h\dfrac{1.6}{9.8} \mathrm{~h}9.81.6 h