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

    Get Free Puzzle Updates

Facebook Login
Site Registration

Can you calculate the number of hours taken by C alone to fill the cistern ?

0 votes

Three pipes A , B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill it in 7 hours.
Can you calculate the number of hours taken by C alone to fill the cistern ?

posted Dec 3, 2014 by Deepak Chitragar

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

1 Answer

+1 vote
Best answer

Ans: 14 hrs
Let cistern is of 6 litres (u can assume any no.)
in first 2 hrs 2 litres were filled.then A&B takes 7 hrs to fill 4 litres.So combined speed of A&B is 4/7 lit/hr.
Let speed of C be c lit/hr. so,
4/7×2 + c×2 = 2
c=3/7 lit/hr
So time taken by C to fill whole cistern:
6÷3/7=14 hrs.
Ans=14 hrs

answer Dec 3, 2014 by Swapnil Morankar

Similar Puzzles
+2 votes

A cistern has three pipes A, B and C. The pipes A and B can fill it in 4 and 5 hours respectively and C can empty it in 2 hours. If the pipes are opened in order at 1, 2 and 3 am respectively..
When will the cistern be empty?

0 votes

Pipe A can fill a cistern in 4 hours while pipe B can empty it in 6 hours. If both of them are opened together at the same time when the tank is empty, then how many hours would be taken by them to fill it?

+1 vote

Mukesh and Chandan can complete a task in 30 days when working together. After Mukesh and Chandan have been working together for 11 days, Chandan is called away and Mukesh, all by himself completes the task in the next 28 days.

Had Mukesh been working alone, How many number of days taken by him to complete the task.

0 votes

There was a big pond with two taps - small tap and large tap.

Six large taps can drain the reservoir completely in exactly 12 hours while six small taps will take 18 hours to drain the water.

Now task is to calculate the time that will be taken by 6 large taps and 6 small taps together to drain the reservoir?

0 votes

Three taps together drains a tank in 5 hours.
If first tap drains this tank in 10 hours alone.
Then what will be the minimum hours taken by the second tap to drain this tank ?

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.