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? About the author Kennedy

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 Reply

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