Question:A man can row 12 kmph in still water. If takes him twice as long to row up as to row down the river. Find the rate of stream.
Answer Let man's rate upstream be x kmph. Then, his rate still water` = 1/2 (2x + x)` kmph` = (3x)/2` kmph `:. (3x)/2 = 12 or x = 8` `:. (300)/(10 + x) = 8 or 300` `= 80 + 8x or x` `= (220)/8` `= 55/2` m/sec. :. Speed of second train `= (55/2 xx 18/5)` kmph = 99 kmph
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A man can row 12 kmph in still water. If takes him twice as long to row up as to row down the river. Find the rate of stream.