U got matches and 2 ropes that burn out in 1 hour,but they burn at odd speeds,so!


Question: U got matches and 2 ropes that burn out in 1 hour,but they burn at odd speeds,some bits fast,some slow!?
How can you calculate exactly 45 minutesWww@Enter-QA@Com


Answers:
Two ropes
A and B

Start by burning A at both ends and B at only one end!.

When A fully burns out (1/2 hour), ignite the other end of B!.
At this point, B will have burnt out 1/2 of an hour, so there will be 1/2 of an hour's length of rope left!. If you ignite a rope on both ends, it will cut the time in half, so !.5 * !.5 = !.25 = 1/4 hour = 15 minutes!.
30 minutes + 15 minutes = 45 minutesWww@Enter-QA@Com

Cutting the ropes to lengths 3/4th of their original lengths and then burning them till they burn completely!.Www@Enter-QA@Com

if the total time is 1 hour (30 Minutes per rope) you burn one completely and the other half way!.Www@Enter-QA@Com

you can'tWww@Enter-QA@Com

by your shadow on the groundWww@Enter-QA@Com

Use your watch!.!.!.!.!.um!.!.!.!.!.!.Doh!.!.!.!.!.!.Doh!.!.!.Www@Enter-QA@Com

with a watch!?Www@Enter-QA@Com



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