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You have been given two pieces of flammable rope. The speed at which each individual rope can burn is inconsistent, but if you light the end with a match, the short rope will take 30 minutes to burn and the long rope takes an hour. How can you used the ropes to determine when 45 minutes have passed?
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Senior Software Engineer

Interviewed at GoDaddy

3.9
Sep 8, 2011

You have been given two pieces of flammable rope. The speed at which each individual rope can burn is inconsistent, but if you light the end with a match, the short rope will take 30 minutes to burn and the long rope takes an hour. How can you used the ropes to determine when 45 minutes have passed?

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