Aman rows at a speed fo 10 km/h in stilwater to a certain distance ups – InterviewSolution

1.	Aman rows at a speed fo 10 km/h in stilwater to a certain distance upstream andback to the starting point in a river whichflows at 4 km/hr. Find his average speedfor total journey (in km/hr)(A) 4(B) 6(C) 10(D) 8.4
Answer» Upstream speed = 10-4=6Downstream speed = 10+4=14Now avg of 6 & 14 = (16+14)/2 = 20/2= 10 answer is option (c) 10

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