A boat takes total 11 hr and 15 min to travel 60 km upstream and 60 km downstream. if the speed of boat is 12 km/hr then what is the speed of current ?
Solution(By Examveda Team)
Speed of current = 4When going upstream, if the current is u and speed of boat is v, total speed will be v−u. When going downstream, the total speed will be v+u. Now,
11.25 =60/(v+u) + 60/(v−u)
given v = 12 km/hr
therefore u = 4
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