Follows 80693

A train travels at a speed of 50 km/h from city A. In 15 minutes, a second train follows him at 20 m/s. We are sitting on the first train. When will the second train catch up with the first?

Correct answer:

t2 =  34.0909 min

Step-by-step explanation:

v1=50 km/h m/s=50:3.6  m/s=13.88889 m/s t1=15 min s=15 60  s=900 s v2=20 m/s  s1=s2  v1 (t+t1)=v2 t 13.888888888889 (t+900)=20 t  6.111111t=12500  t=6.1111111112500=2045.45454545  t=11225002045.454545  t2=t min=t:60  min=2045.4545:60  min=34.091 min=34.0909 min

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