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Miner and Bickford's Fuse : How to get a Fuse of Specific Length

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You are a miner and you have three pieces of Bickford's fuse of equal length. You need only 3/4 of one of them. You have no ruler or other measurement device with you. You cannot also bend the fuses as they are old and can be broken at any point while being bent. You only can ignite them from any end and extinguish at any moment. What would you do to get 3/4 of the fuse?

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Solution Summary

The method of obtaining a fuse of specified is determined. How you can get a specific length is determined.

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Ignite simultaneously one fuse from both ends and the second from one end. When the first fuse ...

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