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At the swimming pool certain pipe can fill it in 5 hours another pipe can fill it in 2 hours a third pipe can empty it in 6 hours with all 3 pipes turned on how much time would it take to fill?
Wiki User
∙ 13y ago
The reciprocal of the added reciprocals.
1/T = 1/A + 1/B + ... 1/Z
In your case:
1/T = 1/5 + 1/2 +1/6
1/T = 6/30 + 15/30 + 5/30
1/T = 26/30
T = 30/26 = 15/13 hours = 1 hour 9 minutes 14 seconds
Wiki User
∙ 13y ago
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