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Interview Question

Interview Mountain View, CA

You have two strings, each of which burns in exactly one

  hour, although not at a constant rate. How do you measure 45 minutes with only these two strings?

Interview Answer

1 Answer


Burn string 1 at both ends. string 2 at one end. when string 1 completely burns, its 30 mins. Immediately light the other end of string 2. It will burn completely in 15 mins

Megha on Mar 17, 2010

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