Wednesday, October 1, 2014

Measure the time.

Puzzle:
You have given two ropes of different lengths and a lighter.
If you light the rope at one end,each rope takes 1 hours to burn completely.
though it takes same amount of time to burn the ropes they burn at different speed.
Meaning, first half of the first rope may take 15 minutes to burn and the second half may take 45 minutes to burn.
and this rate is different for the second rope.

Now the question is how do you measure 45 minutes of time using the two ropes and the lighter?

Solution:Burn the first rope from both sides and burn the second rope from one side.
First rope burns completely in 30 minutes as we lit it from both ends.
as soon as the first rope completely burned lit the other end of the second rope.it will take 15 minutes more to completely burn the second rope. 30+15 is your 45 minutes.

Note: Don't forget to visit us again. Answer to the puzzle will be posted tomorrow with winner's name. You can provide your answer in comments.
Solution:

Winner:

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