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A girl looks the reflection of the top of the lamp post on the mirror which is \(6.6 \ m\) away from the foot of the lamppost. The girl whose height is \(1.25 \ m\) is standing \(2.5\ m\) away from the mirror. Assuming the mirror is placed on the ground facing the sky and the girl, mirror and the lamppost are in a same line, find the height of the lamp post.
The height of the lamp post \(=\) \(m\)
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