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 The unplugged bath (Posted on 2002-07-03)
(This is an old chestnut of a puzzle, but with a slight twist)

It takes six minutes for just the cold tap to fill my bath with water.

The hot tap fills the bath at the same rate, but unfortunately (due to some strange plumbing) after the hot tap has been running for three minutes its supply of water shuts off for a full two and a half while the hot water tank refills and reheats - after the two and a half minutes, the hot tap commences dispensing water once again.

With the plug pulled out, a full bath empties (at a uniform rate) in only four minutes.

With the hot water tank full and the plug pulled out, how long will it take my bath to fill if I turn both taps on?

 See The Solution Submitted by Nick Reed Rating: 3.1250 (8 votes)

 Subject Author Date Problem Solution With Explanation K Sengupta 2007-05-16 11:11:48 some thoughts on the problem K Sengupta 2007-05-12 15:54:49 re: Solution vije 2004-07-02 15:01:50 1980 s vije 2004-07-02 14:58:24 ?? sharlene 2003-02-07 15:15:00 Solution Hershel 2003-01-22 16:25:22 No Subject Cory Taylor 2002-12-20 05:58:43 Solution Justin 2002-07-03 07:43:10 re(3): Maybe... Nick Reed 2002-07-03 07:31:30 re(2): Maybe... Dulanjana 2002-07-03 07:13:07 re: Maybe... Nick Reed 2002-07-03 06:32:22 Maybe... Dulanjana 2002-07-03 06:30:15 Drowning caterpillar Happy 2002-07-03 06:09:03 hmm (2) Cheradenine 2002-07-03 05:54:02 Woop Nick Reed 2002-07-03 05:26:53 re: Solution? levik 2002-07-03 05:01:37 hmm.. Cheradenine 2002-07-03 04:35:30 Solution? Dulanjana 2002-07-03 04:24:40

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