The Wheatstone bridge shown in figure here, gets balanced when the carbon resistor used as R1 has the colour code (Orange, Red, Brown). The resistors R2 and R4 are 80 Ω and 40 Ω, respectively.
Assuming that the colour code for the carbon resistors gives their accurate values, the colour code for the carbon resistor, used as R3, would be
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R1 = 32 × 10 = 320 Ω
∴ Colour code of R3 be Brown, Blue, Brown.
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