A tap can fill a tank in 48 minutes wher...

A tap can fill a tank in 48 minutes whereas another tap can empty it in 2 hours. If both the taps are opened at 11:40 A.M, then the tank will be filled at `12 : 40\ PdotMdot` b. `1: 00\ PdotMdot` c. `1: 20\ PdotMdot` d. `1: 30\ PdotMdot\ `

`12:40` p.m.

`1:30` p.m.

`1:00` p.m.

`1:20` p.m.

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The correct Answer is:

Consider, the filling of tank as a positive work and emptying the tank as negative work.

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