Discussion :: Boats and Streams
- A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
Answer : Option B
Explanation :
72 --- 9 DS = 8
? ---- 1
45 ---- 9 US = 5
? ---- 1 S = ?
S = (8 - 5)/2 = 1.5
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