A 60km trip is there a train travels the first 30 km with a uniform speed of 30km/hr.how fast the train travel ,the next 30km. So as to qverage 40km/hr for the entire tripa
Answers
Answered by
0
Vavg = (Vf + Vi)/2
40km/hr = (Vf + 30km/hr) /2
multiplying by 2 to both sides:
80km/hr = Vf + 30km/hr
Subtracting 30km/hr from both sides:
50km/hr = Vf
40km/hr = (Vf + 30km/hr) /2
multiplying by 2 to both sides:
80km/hr = Vf + 30km/hr
Subtracting 30km/hr from both sides:
50km/hr = Vf
Similar questions