the distance between Delhi and Agra is 200 km a train travels the first hundred kilometre at a speed of 50 km per hour how fast must the train travel the next hundred km so as to average 70 kilometre per hour for the whole journey
Answers
Answered by
3
Explanation:
total time=total distance/average speed
T=200/70
T=20/7hr
time taken to cover first 100km
t=100/50
t=2hr
time remained to cover last 100km
t'=T-t
=20/7-2
t'=6/7hr
speed=distance/time
s=100/6/7
s=116.67m/s
Similar questions