A ball is thrown vertically upwards from the top of a building of height 24.5 m with an initial velocity 19.6 m`s^(-1)`. Taking g = 9.8 ms, calculate : the total time of journey.

Explanation

To solve the problem, we will use the equations of motion under uniform acceleration. The ball is thrown upwards from the top of a building, and we need to calculate the total time of its journey until it hits the ground.

### Given:
- Height of the building (s) = -24.5 m (negative because the displacement is downwards)
- Initial velocity (u) = 19.6 m/s (upwards)
- Acceleration due to gravity (g) = 9.8 m/s² (downwards, hence we take it as -9.8 m/s²)

### Step 1: Write the equation of motion
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