Question 414369
A large water tank has two inlet pipes (large one and small one) and one outlet pipe.
 It take 2 hours to fill the tank with the large inlet pipe.
 It take 6 hours to fill the tank with the small inlet pipe.
 The outlet pipe allows the full tank to be emptied in 8 hours.
What fraction of the tank (initially empty) will be filled in 2.85 hours if all three pipes are in operation?
 Give your answer 2 decimal places.
:
Let the full tank = 1
:
{{{2.85/2}}} + {{{2.85/6}}} - {{{2.85/8}}} = 
1.425 + .475 - .35625 = 1.54375, the tank will have overflowed: