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Simple pipes riddle

 
 
Reply Mon 25 Nov, 2002 08:24 pm
A large fresh water reservoir has two types of drainage system. Small pipes and large pipes. 6 large pipes, on their own, can drain the reservoir in 12 hours. 3 large pipes and 9 small pipes, at the same time, can drain the reservoir in 8 hours. How long will 5 small pipes, on their own, take to drain the reservoir?
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Type: Discussion • Score: 1 • Views: 3,108 • Replies: 5
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patiodog
 
  1  
Reply Tue 26 Nov, 2002 02:59 pm
18 hours?
0 Replies
 
Craven de Kere
 
  1  
Reply Tue 26 Nov, 2002 03:10 pm
Nope, it's not a round hour.
0 Replies
 
fresco
 
  1  
Reply Wed 27 Nov, 2002 01:33 pm
21.6 hours ?
0 Replies
 
BillW
 
  1  
Reply Wed 27 Nov, 2002 01:39 pm
21.6 hours
0 Replies
 
patiodog
 
  1  
Reply Wed 27 Nov, 2002 01:41 pm
no, fresco's got it.
0 Replies
 
 

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