➡ Can You Solve the Burning Rope Riddle?

This simple puzzle recently appeared in a members-only newsletter. Think you can crack it? You have two ropes coated in oil to help them burn. Each rope will take exactly one hour to burn all the way through. However, the ropes don’t burn at constant rates; there are spots where they burn a bit faster and spots where they burn a bit slower, but it always takes one hour to finish the job. With a lighter to ignite the ropes, how can you measure exactly 45 minutes?