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Tofind:the duration of pipe to fill the empty half-filled tank.
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Answer to Problem 20P
If both pipes are accidentally opened it will take
Explanation of Solution
Given:
The fill pipe for tank can fill the tank in
The drain pipe can drain it in
Concept used:
Rate of the work:
Ratio of work to the time interval with changes in time rate of work will change.
Calculation:
The equation where
Remember since one pipe is draining the tank so, work done by that pipe is subtracted. also, the equation equals negative one half instead of 1 since the tank is half- filled and is being drained, not filled.
Multiplying, both sides by the L.C.D of
Multiplying both side by
Hence if both pipe are accidentally opened it will take
Chapter 7 Solutions
Algebra: Structure And Method, Book 1
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