A hiker stands on the edge of a cliff `490 m` above the ground and throwns a stone horiozontally with an initial speed of `15ms^(-1)` neglecting air resistance.The time taken by the stone to reach the ground in seconds is `(g=9.8ms^(2))`

Explanation

To solve the problem of how long it takes for a stone thrown horizontally from a height of 490 m to reach the ground, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values:**
- Height (h) = 490 m
- Acceleration due to gravity (g) = 9.8 m/s²

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