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If you have an 11 minute and 13 minute hourglass, how can you accurately time 15 minutes?

+1 vote
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If you have an 11 minute and 13 minute hourglass, how can you accurately time 15 minutes?
posted Jun 16, 2014 by Vikram Luthra

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1 Answer

+2 votes

Start with both the hourglasses. When 11 minute's finishes, stop both of them. then turn the 11 minute's hourglass. and start the 13 minute's hourglass. this will give us the 2 minutes in 11 minute's time in that hourglass. and using this we can measure 15 MINUTES.

answer Aug 8, 2014 by Ankit Bajpai



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