3. An untreated electric wooden pole that will last 10 years under certain soil condition costs P20,000. If a treated pole will last for 20 years, what is the maximum justifiable amount that can be...

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Extracted text: 3. An untreated electric wooden pole that will last 10 years under certain soil condition costs P20,000. If a treated pole will last for 20 years, what is the maximum justifiable amount that can be paid for the treated pole, if the maximum return on investment is 20%? Consider annual taxes and insurances amount to be 1% of first cost.