A train covers the first 60km of its journey at a speed of 80km/h the next 90 km at a speed of 100km/h and the rest of its 330-km journey at a speed of 120km/h. find the total time taken to complete it's journey. also find its average speed
Asked by babulabishoyee | 17th Oct, 2019, 05:35: AM
Answered by Yasmeen Khan | 17th Oct, 2019, 11:54: AM
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