Task 30212.

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How many lamps rated at 300 watts, designed for 110 V, can be installed in parallel in a building, if the wiring is made of copper wire line length of 100 m and a cross section 9 mm ^ 2, and the voltage in the line is equal to 122?

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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