Kubo sits on a train speeding at 108 km/h. At that moment, the train entered the tunnel, which according to Kub's book, is 2 km long. Kubo noticed that the end of the train had left the tunnel 75 seconds later than the locomotive had entered the tunnel.
What is the length of the train in meters?

Correct answer:

x =  250 m

Step-by-step explanation:

v=108 km/h m/s=108:3.6  m/s=30 m/s a=2 km m=2 1000  m=2000 m T=75 s  T=(a+x)/v  T v=a+x  x=T va=75 302000=250 m

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    Units of physical quantities:

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