A train travels the first 15km at a uniform speed of 30km/h ;the next 75km at a uniform speed of 50km/h ;and the last 10km at a uniform speed of 20km/h. calculate the average speed for the entire train journey.
Answers
Answered by
3
Answer:
hi here is ur answer
Explanation:
40 km\h
d1=15km s1=30km\h
d2=10km s2=20km\h
d3=75km s3=50km\h
total time taken=t1+t2+t3
=0.5+0.5+1.5=2.5
speed =distance\time
100\2.5=40km\h
3.8
may be it helps you
Similar questions