Question

AYUDA
A train enters a tunel at a speed of 138km/h and it takes it 7 seconds to come out. Find out the length of the tunnel.​

Answer 1

d = 268,33 m/s

Sabemos que:

v = d / t

donde:

v = velocidad [m/s]

d = distancia [m]

t = tiempo [s]

Primero estandarizamos unidades:

v = (138 km/h)*(1h/3600s)*(1000m/1km)

v = 38,33 m/s

Por dato tenemos:

v = d / t

38,33 = d / 7

d = 268,33 m/s