a train covers the first 160 km of ajourney at 40 km/h,the next 180 km at 45km/h , and the last 200 km at 50km/h . 

1..the total time it takes to complete the jourmey?

2..the average speed of the train during the whole journey?

Asked by rojesh.sahoo | 7th Feb, 2019, 09:13: PM

Expert Answer:

time space taken space to space cover space 160 km space equals space 160 over 40 equals 4 hrs
time space taken space to space cover space 180 km equals 180 over 45 equals 4 space hrs
time space taken space to space cover space 200 km equals 200 over 50 equals 4 space hrs
total space time space equals space 12 space hrs
avg space speed space equals fraction numerator 40 plus 45 plus 50 over denominator 3 end fraction equals 45 km divided by hr

Answered by Arun | 8th Feb, 2019, 10:26: AM

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