1955 AHSME Problems/Problem 36
A cylindrical oil tank, lying horizontally, has an interior length of feet and an interior diameter of feet. If the rectangular surface of the oil has an area of square feet, the depth of the oil is:
Solution (takes advantage of answer choices)
In order to complete the rectangle area of the oil tank, the chord on the circle must have a length of . Since it's not the diameter , there are two possible outcomes. The only choice that reflects this is .
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