Engineering Economics
A telephone switchboard 100 pair cable can be made up with either enameled wire or tinned wire. There will be 400 soldered connections. The cost of soldering a connection on the enameled wire will be P 1.65 on the tinned wire, it will be P 1.15. A 100- pair cable made up with enameled wire cost P 0.55 per linear foot and those made up of tinned wire cost P 0.75 per linear foot. Determine the length of cable run in feet so that the cost of each installation would be the same.

1,100 feet
1,040 feet
1,000 feet
1,120 feet

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Engineering Economics
Under the depletion allowance method in computing depreciation, the depletion charge is equal to either ______ whichever is smaller.

Fixed percentage of gross income or the net taxable income
50% of the fixed percentage of gross income or 50% of the net taxable income
50% of the fixed percentage of gross income or the net taxable income
Fixed percentage of gross income or 50% of the net taxable income

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