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…

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 $\displaystyle 40$ V, $\displaystyle 10$ V and $\displaystyle 40$ V, respectively. The amplitude of current flowing through LCR series circuit is $\displaystyle 10 \sqrt{2} \mathrm{~A}$. The impedance of the circuit is :