A cistern is fitted with two pipes. One to fill which is called an _____ and one to empty which is called an _____.
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OUTLET: A pipe connected with a tank or a cistern or a reservoir, emptying it, is known as Outlet. A pipe can fill a tank in x hours, then: part filled in 1 hour = 1/x.
When a pipe can empty a tank in y hours, then: part emptied in 1 hour = 1/y.
If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours( where y>x), then on opening both the pipes, the net part filled in 1 hour=(1/x) – (1/y).
If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours (where x>y), then on opening both the pipes, the net part filled in 1 hour= [(1/y) – (1/x)].
Suppose two pipes can fill an empty
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