top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

Three candles which can burn, 60 minutes, 80 minutes and 100 minutes respectively are lit at different times...

0 votes
173 views

Three candles which can burn, 60 minutes, 80 minutes and 100 minutes respectively are lit at different times. All the candles are burning simultaneously for 30 minutes, and there is a total of 40 minutes in which exactly one is burning. For how many minutes are exactly two candles burning?

posted Jul 15, 2016 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

1 Answer

0 votes

55 minutes.
.
The total burn time of the candles = 60 + 80 + 100 = 240 minutes.
During that burn time either one, two or three candles are burning.
.
During 30 minutes all three candles burn = 90 minutes burn time.
During 40 minutes only one candle burns = 40 minutes burn time.
.
That leaves (240 - 90 - 40 = ) 110 minutes of burn time during which two candles are burning
=> 110 / 2 = 55 minutes long.

answer Jul 17, 2016 by Jcm



Similar Puzzles
+2 votes

Today is Newton birthday.
A year ago, Newton had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is Newton Today?

Of course, he is not five today.

0 votes

Two buses travel to a place at 45 kmph and 60 kmph respectively. If the second bus takes 11/2 hours less than the first for the journey, then what is the length of the journey?

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...