Posted by: republican January 27, 2007
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swatantra, very close, you got it mostly right.
burn two ends of rope A and one end of Rope B.
rope A will burn out in 30 mins.. and rope B will burn for 30 mins (30 mins left to go).
as soon as rope A burns out, light the other end of rope B.
rope B will burn out in 15 mins.
that's 45 mins.