A 25 m long antenna is mounted on an antenna tower. The height of the antenna tower is 75 m. The wavelength (in meter) of the signal transmitted by this antenna would be:

For effective transmission, the wavelength of the signal transmitted by an antenna is related to the length of the antenna $$L$$ by the relation $$L = \frac{\lambda}{4}$$, where $$\lambda$$ is the wavelength of the signal.

Given that the antenna length is $$L = 25$$ m (note that the height of the tower is irrelevant — only the antenna length matters for determining the transmitted wavelength), we have:

$$\lambda = 4L = 4 \times 25 = 100 \text{ m}$$.