I have 2 hour glass one measures 11 minute and another measures 7 minute. how u measure 15 minutes? using only one flip of any one of hour glass.
only one flip is allowed
- Evangeline
- 29 Jul
- 283 Views
- 8 Answers
Your Answer
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ManishMV
- 05 Jul
so the best way to do is first we will start the hour glass one and when it ends after 11 minute we will flip it back. when it finishes we will start the hour glass two. after the end of hour glass two we can minus it from the the total of first to get the result.
hour glass one =11 minutes
after flip=22 minutes
hour glass two=7 minutes
final result=22 minutes-7 minutes
=15 minutes
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