Question

Please the answer I will mark as abrainliest

Answer 1

Answer:

only of first floor mark me as brainliest answer

Answer 2

This a "law of motions" problem. I hope you are familiar with the three motions of equation, which are as follows

v = u + at

S = ut + (a*t^2)/2

v^2 = u^2 + 2as

where a is the acceleration, S is the distance covered, t is the time taken and u , v are velocities at the start and end of the event.

And also the answer depends on the value of g, so variations may occur.