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
• 9 years agoHelpfull: Yes(23) No(5)
• Burn first rope from both the ends and the second rope from one end simultaneously. The first rope burns off in 30 min. Now light the other end of the second rope which was already been burning for 30 minutes. The second rope will finish in next 15 minutes
  
  
  By Jithin Jose
  Rajagiri Topper
  8281069653
• 9 years agoHelpfull: Yes(12) No(2)
• First burn the one rope on two sides and after that burn the another rope on one side both are at same time,after some time look at the first rope if it is burn half then burn second rope second side also then 45min we can measure
• 9 years agoHelpfull: Yes(1) No(0)
• put fire on 1st rope from both of its sides,we get 30 min from it. Then burn the 2nd rope from both of its sides and from middle too we will get 15 mins.
  Total of 45 mins.
• 8 years agoHelpfull: Yes(0) No(0)