A stone is drpped from the top of a tall cliff and n seconds later another stone is thrown vertically downwards with a velocity u. Then the second stone overakes the first, below the top of the cliff at a distance given by

Options

A. `g/2 [(n(gn//2-u))/((gn-u))]^(2)`
B. `g/2[(n(gn-u//2))/((gn-u))]^(2)`
C. `g/2[(n(gn-u//2))/((gn-u//2))]^(2)`
D. `g/2[(gn-u)/(gn-(u-2))]^(2)`

Answer

A