A 100 V voltmeter of internal resistance 20 kΩ in series with a high resistance R1 is connected to a 110 V line. The voltmeter reads 5 V, the value of R1 is

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A 100 V voltmeter of internal resistance 20 kΩ in series with a high resistance R1 is connected to a 110 V line. The voltmeter reads 5 V, the value of R1 is