The speed of a boat in still water is 7km/hr and the speed of a stream is 3km/hr.Find the time taken by the boat to go: (i) 12 km upstream (ii) 35 km downstream

Answers (1)
  1. The speed of the boat upstream=(7-3)km/hr=4km/hr
    Therefore,the time taken by the boat to go 12 km upstream=frac124hr=3, hours
     
  2. The speed of the boat downstream=(7+3)km/hr=10km/hr
    Therefore, time taken by the boat to 35 km downstream
    =frac3510hr=frac72, hours=3, hours, 30, minutes

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