Matías va en su bicicleta, con velocidad constante de 28 km/h, en una calle rectilínea siguiendo a Ana, que va corriendo en el mismo sentido, a 10 km/h, también con velocidad constante. Si inicialmente estaban distanciados 200 m, hallar cuánto tiempo (en segundos) después la alcanzará.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?