A stone is dropped from the top of a tall building and after 2 seconds another stone is thrown vertically…
A stone is dropped from the top of a tall building and after 2 seconds another stone is thrown vertically downwards with a velocity $5 \mathrm{~ms}^{-1}$ from the same point. Then the distance from the top of the building at which second stone overtakes the first is ____ $\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)$