By what percentage will the transmission range of a T.V. tower be affected when the height of the tower is increased by 21% ?

Explanation

To solve the problem of how the transmission range of a T.V. tower is affected by a 21% increase in the height of the tower, we can follow these steps:

### Step 1: Understand the relationship between height and transmission range
The transmission range \( d \) of a T.V. tower is given by the formula:
\[ d = \sqrt{2 \cdot h \cdot r} \]
where \( h \) is the height of the tower and \( r \) is the radius of the Earth.
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