On a 100km track a train travels first 50km with a uniform speed of a 20km/hr and remaining 50km with a speed of 60km/hr . Find average speed of time?
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Answer:
Correct option is
A
90 km/h
Total time for the journey, t=100/45=20/9 hrs
Time for first 50 km, t
1
=50/30=5/3 hr
So, time for remaining journey, t
2
=20/9−5/3=5/9 hrs
Speed for remaining journey v
2
=
5/9
50
=90 km/h
Answer:
90 km lol hahaha brother or sister