Two pipes can fill a tank in 10 hours and 12 hours resp. while third pipe empties the full tank in 15 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled?

Options
- 7 .48 hours
- 5.46 hours
- 8.88 hours
- 6.89 hours

CORRECT ANSWER : 8.88 hours

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