Easy · Brain Teasers & Logic · Free response · ~6 min · #15
Measuring 45 Minutes with Two Ropes
You have two ropes and a lighter. Each rope takes exactly 60 minutes to burn completely, but they burn non-uniformly (half the length does not necessarily take 30 minutes).
Describe how to measure exactly 45 minutes.
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Give the problem an honest attempt first, then reveal the full explanation.
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