Two ropes are given to you. Both of the ropes will take exactly an hour each to burn fully.
You are asked to measure forty five minutes using the two ropes. How will you achieve to do it? Choose the correct answer.
A) 30 minutes  B) 40 min  C) 50 minutes  D) 60 minutes  E) 70 minutes
Solution:   Take both the ropes. Now light the first rope from both the ends. Light the second rope from just one end. In thirty minutes, the first rope will burn fully. At this point of time, the second rope will be left exactly half and you have to light it from the second end now. It will take half of the actual time (thirty minutes) to burn now i.e. fifteen minute.   Thirty Minutes + Fifteen minutes = Forty Minutes   Answer 40 min
<result>B</result>
Two ropes are given to you. Both of the ropes will take exactly an hour each to burn fully.
You are asked to measure forty five minutes using the two ropes. How will you achieve to do it?