- Light one rope at both ends (30 mins). At the same time, light the other rope at one end. When the first rope burns out, light the other end of the second rope (15 mins).
- It is not possible.
- Burn one rope and then half of the second rope.
- Cut one rope into a 3/4 length and burn it.
Question: You have two ropes that each take exactly one hour to burn from one end to the other. They do not burn at a uniform rate. How can you measure exactly 45 minutes?
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