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