Correct option is A
Time taken by boat to cover 105 km upstream = 105/15 = 7 hours
So, time taken by boat to cover 108 km downstream = 7 ×6/7= 6 hours
So, downstream speed of boat = 108/6 = 18 km/hr
Speed of stream = (18 - 15)/2 = 1.5 km/hr
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35 Questions
35 Marks
20 Mins
