12. A las 10 de la mañana Elena sale a 100 Km/h de una ciudad A con dirección a Madrid. A la misma hora sale Javier desde otra ciudad B que situada en la misma dirección que A y lo hace a una velocidad de 60 Km/h también con dirección a Madrid. Sabiendo que la distancia en carretera entre A y B es de 132 Km, y suponiendo que los dos van a una velocidad constante todo el camino, contesta a las siguientes preguntas:
a) ¿Qué tiempo tardarán en encontrarse Elena y Javier?
b) ¿Qué hora será cuando se encuentren?
c) ¿Qué distancia habrá recorrido cada uno de ellos en ese momento?
Answers: 3
![100 [\frac{km}{h} ]*1[\frac{h}{3600s}]*1000[\frac{m}{1km} ] = 27.77[m/s]\\60[\frac{km}{h} ]*1[\frac{h}{3600s}]*1000[\frac{m}{1km} ] = 16.66[m/s]](/tpl/images/0922/1307/c2ca1.png)
![16.66*t = 27.77*t -132000\\27.77*t - 16.66*t = 132000\\11.11*t = 132000\\t = 11880.83 [s] = 3.3 [h]](/tpl/images/0922/1307/05f0e.png)
![0.3 [hr]*60[\frac{min}{1hr} ]= 18 min](/tpl/images/0922/1307/edbf0.png)
![x = v*t\\x = 27.77*11800.83 = 327791.6 [m] = 327.79 [km]\\](/tpl/images/0922/1307/7234c.png)
![x = v*t\\x = 16.66*11800.83 = 196601.8 [m] = 196.6 [km]](/tpl/images/0922/1307/803e1.png)
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12. A las 10 de la mañana Elena sale a 100 Km/h de una ciudad A con dirección a Madrid. A la misma h...
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