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An inductor of inductance L,a capacitor ...

An inductor of inductance `L`,a capacitor of capacitance `C` and a resistor of resistance'`R`'are connected in series to an ac source of potential difference`V` volts as shown in figure. Potential difference across `L,C` and `R` is `40V`, `10V` and `40V`,respectively.The amplitude of current flowing through LCR series circuit is `10sqrt(2)A`.The impedance of the circuit is :

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