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Choose the correct option.
There are 2 taps A and B to fill up a water tank. The tank can be filled in 40 minutes if both taps are on. The same tank can be filled in 60 minutes if tap A alone is on. How much time will tap B alone take to fill up the same tank ?
A64 minutes
B80 minutes
C96 minutes
D120 minutes
ENone of these
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