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Re: 1 of toughest TSD question ever
by Anupam Mazumdar - Sunday, 14 September 2014, 09:12 PM
  let speed of swimmer = x, water = y
time taken by the swimmer to meet the cork after turning back = t

so yt = 1
if you check the distance, (1/2)(x-y) + y((1/2)+t) = (x+y)t
solve and get y = 1

First question of IE Irodov..Brings back memories