A tank can be filled by tap A and B in 6 hrs and 3 hrs, respectively. Tap c can empty the filled tank in 5 hrs. If all the three taps are opened alternate and start from A, how much time will be taken to fill the tank completely?

A tank can be filled by tap A and B in 6 hrs and 3 hrs, respectively.

1.	A tank can be filled by tap A and B in 6 hrs and 3 hrs, respectively. Tap c can empty the filled tank in 5 hrs. If all the three taps are opened alternate and start from A, how much time will be taken to fill the tank completely?
A.	\(\frac{1}{{10}}\;hrs\)
B.	\(\frac{1}{9}hrs\)
C.	\(\frac{5}{9}hrs\)
D.	\(\frac{77}{10}hrs\)
Answer» E.

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A tank can be filled by tap A and B in 6 hrs and 3 hrs, respectively. Tap c can empty the filled tank in 5 hrs. If all the three taps are opened alternate and start from A, how much time will be taken to fill the tank completely?

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