How to Calculate Heat Loss in a Long Cable for a Single-Phase Load?

[Stivi]

Homework Statement

A 69 kW single-phase load with a power factor of 0.68 lagging is fed by a long cable with an impedance of 0.011+j0.005 Ω per phase. The voltage across the load is 230 V RMS. Calculate the heat loss in the cable in Watt [W].

Homework Equations

The Attempt at a Solution

 

[rock.freak667]

The Attempt at a Solution

You might want to start by finding the magnitude of the current I.