The shadow of a tower standing on a level ground is found to be 40 m longer when the Suns altitude is `30o`than when it is `60o`. Find the height of the tower.

Explanation

To find the height of the tower using the information given about the shadows at different angles of elevation, we can follow these steps:

### Step-by-Step Solution:

1. **Define Variables**:
- Let \( h \) be the height of the tower (AB).
- Let \( x \) be the length of the shadow when the sun's altitude is \( 60^\circ \) (BC).
- The shadow when the sun's altitude is \( 30^\circ \) (BD) is \( x + 40 \) meters.
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