**1. The problem statement, all variables and given/known data**

This is a very simple question. I even got the answer but I don’t exactly I got it. Here it is:

A stone is allowed to fall from the top of a 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where will the two stones meet.

**2. Relevant equations**

v^{2} – u^{2} = 2as

s = ut + 1/2at^{2}

v = u + at

**1. The problem statement, all variables and given/known data**

**2. Relevant equations**

**3. The attempt at a solution**

http://ift.tt/1pTz6G5