Two cities are 150km apart. Electric power is sent from one city to...

Distance between the two cities, $150km$.

Voltage drop per kilometre is $8V{km}^{- 1}$.

Resistance per kilometre $0 . 5Ω{km}^{- 1}$

Total voltage drop will be,
${V}_{drop} = 150km \times 8V{km}^{- 1} = 1200V$

Total resistance of wire,
$R = 0.5Ω{km}^{- 1} \times 150km = 75Ω$

Therefore, the power loss will be, $P = \dfrac{{V}^{2}}{R} = \dfrac{{\left(150 \times 8\right)}^{2}}{0.5 \times 150} = 19.2kW$