The minimum weight of H(2) filled in a b...

The minimum weight of `H_(2)` filled in a balloon of weight `w_(1)` kg to just lift it from the ground is `w_(2)` kg. If `w_(3)` kg of `H_(2)` is filled into this balloon, the payload of the balloon will be (the volume of the balloon is supposed to be same with `w_(2) or w_(3)` kg of `H_(2)`)

`w_(2)-w_(3)`

`(w_(2)-w_(3)-w_(1))`

`(w_(3)-w_(2))`

`(w_(3)-w_(2)-w_(1))`

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