A group of grade 11 students decide to have a party at the end of the school year. In order


A group of grade 11 students decide to have a party at the end of the school year. In order to decorate thevenue, they fill balloons with hydrogen gas and helium gas. Hydrogen filled balloons took 28.4 hours to go flat. Howlong would it have taken the helium filled balloons to go flat?​


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