a boat which has a speed of 75km/hr, goes upstream along the wind and returns to tje starting point.the speed of the stream and the wind is 4km/hr and 9km/hr respectively.if the total distance 90 km is covered by the boatin 8 hour,then find the time taken to travel upstream
Asked by Pdas7Pdas743294 | 16th Apr, 2020, 03:00: PM
Answered by Arun | 19th Apr, 2020, 09:45: AM
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