on a 120 km track A train travels the first 30km at a uniform speed of 30 km per hour how fast was the train travel the next 90km so as to average 60 km /h for the entire trip.
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Answer:
60 km/h
Explanation:
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Answer:
Explanation:
Average speed=Total distance/Time
Time=120/60=2hrs
Time for 1st 30km=30/30=1hr
Time remaining=2-1=1hr
Distance remaining=90km
Required speed=90/1=90km/hr
Hope you understood
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