Burning Rope Timer Puzzle
1,447.1K Views
A man has two ropes of varying thickness (Those two ropes are not identical, they aren’t the same density nor the same length nor the same width). Each rope burns in 60 minutes. He actually wants to measure 45 mins. How can he measure 45 mins using only these two ropes.
He can’t cut the one rope in half because the ropes are non-homogeneous and he can’t be sure how long it will burn.
He will burn one of the rope at both the ends and the second rope at one end. After half an hour, the first one burns completely and at this point of time, he will burn the other end of the second rope so now it will take 15 mins more to completely burn. so total time is 30+15 i.e. 45mins.
Your Answer
More puzzles to try-
Only sister of your mother’s only brother relationship riddle
If the only sister of your mother’s only brother, had only child. What is that child to you?Read More »Digits replaces Words
Every words stands for unique digit that makes the arithmetic equation true SEVEN + SEVEN + SIX = TWENTY. What ...Read More »Swim in the ocean
It is the part of the bird that is not in the sky. Ii can swim in the ocean and ...Read More »Modern Peasant riddle
Peasant John wants to buy new chickens, pigs, and horses. A new chicken costs 50 euro cents, a pig 3 ...Read More »A simple probability question
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child ...Read More »What make you cold riddle
A think always makes you cold, you feel it when its breezy and you cannot see it? What is it?Read More »Heard but not Seen
Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What ...Read More »Chocolates Bricks Riddle
How many steps are required to break an m × n sized bar of chocolate into 1 × 1 pieces? ...Read More »Buying eggs puzzle
The cost of eggs at a local shop in Burnley: Cost of one snake egg: 5 pence. Cost of one ...Read More »Initializing an array in constant time
Consider the following array operations. Init(N,d) initializes an array of N elements so that each element has value d. Once ...Read More »Alex confidence puzzle
Alex brings his school supplies to the counter. The cashier rings up his purchase for a total of $1.70. Alex ...Read More »In the Rain but hair didn’t wet puzzle
Jim and his mum and dad went out in the rain on their holiday but only two of them got ...Read More »Harder to Catch the Faster You Run
What is harder to catch the faster you run?Read More »Measure exactly 4 cups of sugar
You are in a cookie factory, and need to make a huge batch of chocolate chip cookies. The recipe calls ...Read More »Which man gets the cow?
Two men come before the king because one of their beloved pets has been claimed by the other. Both of ...Read More »Find the survivor
100 people standing in a circle in an order 1 to 100. No.1 has a sword. He kills next person ...Read More »Hard Series
What is the next number in this series? 4,12,84,3612….Read More »Crack the Glass
If boiling water is poured into a thick glass as well as a very thin glass, which is more likely ...Read More »Can you deduce the password from that?
In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters ...Read More »Little johnny and cats correct miscalculation riddle
Little Johnny’s teacher asks him, “If I gave you two cats, then two more, and two more cats; how many ...Read More »
Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle