A man can row 6 km hr in still water If the speed of the current is 2 km hr it takes 4 hours more in...........

Quantitative Aptitude ( CCS) Boats and Streams

A man can row 6 km/hr in still water. If the speed of the current is 2 km/hr, it takes 4 hours more in upstream than in the downstream than in the downstream for the same distance. The distance is

30 km

24 km

20 km

32 km

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Explanation:

Speed of man in still water, x = 6 km/h
Speed of current, y = 2 km/h
Let Distance = M
ATQ
Upstream time = Downstream tim + 4
M/4 = M/(8 + 4)
M/4 = (M + 32)/8
M/1 = (M + 32)/2
M = 32
Thus, Distance = 32 km