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A water tank has two holes. The 1st hole...

A water tank has two holes. The 1st hole alone makes the tank empty in 3 min and 2nd hole alone makes the tank empty in 5 min. If water leaks out a constant rate, how long in minutes does it. If both the holes together empty the tank?

A

`7//8`

B

`2frac(7)8)`

C

`1frac(5)(8)`

D

`1frac(7)(8)`

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