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
