the reading on a high resistance voltmeter when a cell is connected across it is 2 2 v - Physics - Current Electricity

Question

the reading on a high resistance voltmeter when a cell is
connected across it is 2 2 v When the terminal of the cells are
also connected to a resistance of 5 v ,the voltmeter reading drops
to 6 8 v Find the internal resistance of the cell?????

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the reading on a high resistance voltmeter when a cell is connected across it is 2.2 v . When the terminal of the cells are also connected to a resistance of 5 v ,the voltmeter reading drops to 6.8 v . Find the internal resistance of the cell?????