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

Explanation

To solve the problem of when and where the two stones will meet, we can break it down into several steps.

### Step 1: Understand the Problem
We have two stones:
1. Stone A is dropped from a height of 100 meters (initial velocity = 0 m/s).
2. Stone B is projected upwards from the ground with an initial velocity of 25 m/s.

### Step 2: Define the Motion of Each Stone
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