A boat covers a certain distance downstream in 1 hour, while it comes back in 11⁄2 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
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P.S. time taken for upstream looks like 11/2 , isn’t it one and a half hours ?
P.S. time taken for upstream looks like 11/2 , isn’t it one and a half hours ?
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