Answers

2015-01-23T19:08:13+05:30
Time taken by A to fill the tank=5hours
A's on hour work=1\5
time taken by B to fill the tank=6hours
B's one hour work=1/6
time taken by A and B to fill the tank=1/5+1\6
                                                     =11/30
time taken by C to empty the tank=12hours
C's one hour work=1\12
                         =11\30--1/12
                         =17/60
                         =60/17
                         =3whole9/17
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