A stone dropped from a height $\text{'}h\text{'}$ reaches the Earth's surface in $1 s$. If the same stone is taken to Moon and dropped freely from the same height then it will reach the surface of the Moon in a time (The $\text{'}g\text{'}$ of Moon is $\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$6$}\right. \mathrm{times}$ that of Earth) :-