Question 414657
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Hi
Let s and c represent the speed(rowing) and the current respectively
Question states***   NOte D/t = r
 s + c = 8kmph           |40km/5hr = 8kmph
 s - c = 5kmph           |40km/8hr = 5kmph
 2s  = 13
  s = 13/2 or 6.5mph
  c = 1.5mph      |  (8kmph-s) from 1st Eq