Timetable 3401

The train ran the distance between stations at a speed of 90km/h for 4 hours. What speed can he drive if, according to the new timetable, the journey takes an hour longer?

Correct answer:

v =  72 km/h

Step-by-step explanation:

s=90 4=360 v=s/(4+1)=360/(4+1)=72 km/h

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