SOLUTION: A tank can be filled by one pipe in 45 minutes and by another pipe in 55 minutes. How long would it take both to fill it ?
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Question 937611: A tank can be filled by one pipe in 45 minutes and by another pipe in 55 minutes. How long would it take both to fill it ?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
r = w/t
rates are additive:
r = 1/45 + 1/55
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t = w/r
t = 1/(1/45 + 1/55)
t = 24.75 minutes
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