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A tap can fill an empty tank in 48 minutes whereas another tap can empty the full tank in 2 hours. If both the taps are opened at `11:40` a.m., when will the empty tank be filled ?
A. `12:40` p.m.
B. `1:30` p.m.
C. `1:00` p.m.
D. `1:20` p.m.

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Best answer
Correct Answer - C
Consider, the filling of tank as a positive work and emptying the tank as negative work.

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