Una torre de 25?

Solución :

<img src="https://tex.z-dn.net/?f=%5Ctextup%7BPodemos%20usar%20las%20propiedades%7D%5C%5C%5Ctextup%7Bde%20las%20razones%20y%20proporciones%7D%5C%5C%5Ctextup%7B%20y%20se%20tienen%20las%20siguientes%20relaciones%3A%7D%5C%5C%5Ctextup%7BComo%20la%20altura%20H%20del%20edificio%20es%2025.05%7D%5C%5C%5Ctextup%7By%20la%20sombra%20X%20que%20proyecta%20es%20de%2033.40%20m%7D%5C%5C%5Ctextup%7By%20a%20esa%20misma%20hora%20una%20persona%20con%20una%20altura%20h%20proyecta%20una%20sombra%20de%20x%20metros%2C%20entonces%3A%7D%5C%5C%5Cfrac%7BH%7D%7Bh%7D%3D%5Cfrac%7BX%7D%7Bx%7D%5C%5C%5Ctextup%7BSustituyendo%20los%20valores%20previos%20se%20tiene%3A%7D%5C%5C%5Cfrac%7B25.05%5C%2Cm%7D%7B33.40%5C%2Cm%7D%3D%5Cfrac%7B1.80%5C%2Cm%7D%7Bx%7D%5C%5C%5Ctextup%7BDespejando%20x%20se%20tiene%3A%7D%5C%5Cx%2825.05%5C%2Cm%29%3D%281.80%5C%2Cm%29%2833.40%5C%2Cm%29%5C%5Cx%3D%5Cfrac%7B%281.80%5C%2Cm%29%2833.40%5C%2Cm%29%7D%7B25.05%5C%2Cm%7D%5C%5Cx%3D2.4%5C%2Cm" />

Saludos.