a train travels the 15 km at uniform speed of 30 km/h.the next 75 km at a uniform speed of 50 km/h and the last 10 km at uniform speed of 20 km/h.calculate the average speed for the entire train journey
Answers
Answered by
1
Explanation:
speed1: s1/t1
30km/h=15/t1
t1=2h
speed2:s2/t
50km/h=75/t
t=1.5h
speed3=s3/t3
20=10/t
t=2h
avg. speed=total s/total t
=15+75+10/2+1.5+2
100/5.5
18.18km/h
Similar questions