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**1. The problem statement, all variables and given/known data**

Design a dc transmission line that can transmit 225 MW of electricity 185 km with

only a 2.0% loss. The wires are to be made of aluminum and the voltage is 660 kV.

2. Relevant equations

2. Relevant equations

P= IV = I^2 * R

R= p(L/A)

Power loss = Pf - Pi

**Attempt at a solution**

I worked through the equations above and found that the cross-sectional area of the wire, if it were a straight wire, would be equal to 1.27*10^-4 square meters. However, I have a bad feeling that this question might be asking for an answer in terms of step-up and step-down transformers, which is a topic I could definitely need some assistance with. Could anyone help explain this to me? My textbook wasn't too helpful... Thanks alot!