Pipes and Cisterns Concept
Posted by
Ravi Kumar at Saturday, July 23, 2011
Share this post:

1. INLET:A pipe connected with a tank or cistern or a reservoir, that fills it, it is known as Inlet.
OUTLET:A pipe connected with a tank or a cistern or a reservoir, emptying it, is known as Outlet.
2. i) If a pipe can fill a tank in x hours, then : part filled in 1 hour=1/x.
ii)If a pipe can empty a tank in y hours, then : part emptied in 1 hour=1/y.
iii)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).
iv)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).
v) If two pipes A and B can fill a tank in x hours and y hours respectively. If both the pipes are opened simultaneously, part filled by A+B in 1 hour= 1/x +1/y.