Vipul was studying for his examinations and the lights went
off. It was around 1:00 AM. He lighted two uniform candles
of equal length but one thicker than the other. The thick
candle is supposed to last six hours and the thin one two
hours less. When he finally went to sleep, the thick candle
was twice as long as the thin one.

For how long did Vipul study in candle light?




Answers were Sorted based on User's Feedback



Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / krishna kanth reddy

3 hours from 1A.M....That means upto early morning 4 A.M

Is This Answer Correct ?    38 Yes 4 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / rajesh

let the height of the candles be 4 ft
2 hr half of the thin candle lit now height 2 ft.
again 1 hr lit makes the thin candle 1 ft.
but the thick candle lasts 6 hr
in three hour it lits half of its height so 2 ft remaining
so the candles were lit three hours
till 4 am he used the candles

Is This Answer Correct ?    15 Yes 0 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / asdff

ya 4 am is the rite answer...

Is This Answer Correct ?    17 Yes 5 No




Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / sravanthi

he studied for 3 hours means he studied upto 4A.M

Is This Answer Correct ?    7 Yes 2 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / pavi

3 hrs

Is This Answer Correct ?    5 Yes 2 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / priyanshu gupta

let no. of hrs b x
it is given The thick candle is supposed to last six hours
and the thin one two hours less.
so 6-x=2(4-x)
6-x=8-2x
2x-x=8-6
x=2

so he studied 2 hrs in candle light.

Is This Answer Correct ?    14 Yes 13 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / sanjay sudheer

Both have the same length (i.e, say L in meters 'm')
Thick candle melting rate (L/6) of units m/hr
Thick candle melting rate (L/4) of units m/hr
Assume the time after which the given condition is satisfied (That is after 'h' hours)
[L- [(L/6)*h] ] = 2* [L- [(L/4)*h] Solve we will end up with 3hrs
h=3 hrs;
This is the condition for any variable length of the candle;
Try with candle lengths of for easy understanding (i.e., 4, 12, 24 etc) u will endup with same condition { thick candle is twice lengthy than the thin one}

Is This Answer Correct ?    2 Yes 1 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / vivek

IN response to above answer
What if we assume the height of the two candles to be 6 ft??

Is This Answer Correct ?    2 Yes 2 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / rajini

Yes,ofcourse the answer is 2hrs only i.e 3 A.M.

Is This Answer Correct ?    1 Yes 1 No

Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted..

Answer / rohit solanki

Let both of their height be x.
For every hour thin will burn x/4 of x and thick will burn x/6 of x.
After 3 hrs remaining thin will be x - 3*x/4 = x/4 and
remaining thick will be x - 3*x/6 = x/2
Thus after 3 hrs thick will be twice of thin x/2 = 2(x/4)
hence solved.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer



More Puzzles Interview Questions

A farmer needs 8 gallons of water. He has only three unmared buckets, two 6 gallon and one 11 gallon bucket. How can he collect 8 gallons of water using three unmarked buckets? Provide solution with minimal water wastage.

2 Answers  


Consider a number 235, where last digit is the sum of first two digits i.e. 2 + 3 = 5. How many such 3-digit numbers are there?

4 Answers   TCS,


plz send me aptitude test questions on my email id bpraichur@gmail.com

0 Answers  


What is the minimum number of numbers needed to form every number from 1 to 7,000? Example: To form 4884, you would need 2 4s & 2 8s. 4822 requires a 4, a 8, & 2 2s, but you would not count the numbers again that you had already counted from making 4884.

2 Answers  


There is a number that is 5 times the sum of its digits. What is this number? Answer is not 0.

2 Answers   MasterMind,






Jack and Jill are playing cards for a stake of $1 a game. At the end of the evening, Jack has won 3 games and Jill has won $3. How many games did they play?

2 Answers  


You have a sheet cake. There is a rectangular piece missing from the inside of the sheet cake. The location of the missing piece is arbitrary. I was told I could assume I had the means to make the cuts. How do you divide the sheet cake into 2 even proportions with 2 cuts?

15 Answers   Global Analytics, Oracle, Infosys, Google, College School Exams Tests,


Wo kay chej hi jo saal may 1 baar aata hai months may 2 baar aata hai weeks may 4 baar aata hai or din may 6 baar

0 Answers   College School Exams Tests,


one boys usually takes some flowers to temple. three temples are there.each temple has the pool infront of it.the pool's speciality is when we put one thing it doubles that. the boy took all the flowers and put it into the pool. then he took some flowers and submit it in the first temple.then he put the remaining flowers in the second pool and it gets doubles then the took some of them & put them in the second temple. he put the remaining flowers in the third pool and submit all the flowers in that temple.THE CONDITION IS the flowers submited in the temple are equal in number. How much flowers the boy took initially?? How many flowers he submit in each temple??

4 Answers  


7 dogs have got 7 puppies each.Each puppy got 7 kittens as friends.They are all members of a club along with me.What is the strength of the club?

29 Answers  


There are 25 horses and five tracks. There is no stop clock and we have to find the top 5 horses in the bunch. What is the minimum possible races ?

14 Answers   Amazon,


Five students - Akash, Chintan, Jignesh, Mukund and Venky - appeared for an exam. There were total five questions - two multiple choice (a, b or c) and three true/false questions. They answered five questions each and answered as follow. I II III IV V -------------------------------------------------- Chintan c b True True False Akash c c True True True Jignesh a c False True True Mukund b a True True False Venky b b True False True -------------------------------------------------- Also, no two students got the same number of correct answers. Can you tell which are the correct answers? What are their individual score?

1 Answers  






Categories