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March 29, 2017

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a circular chimney pipe with an 8-inch diameter passes vertically from a heater through a metal plate in the roof. the plate has an elliptical hole that measures 8 inches along one axis. if the roof is slanted at an angel of 40 degrees with the horizontal, what is the length of the hole's longer axis?

i am getting 12.4 inches. is this correct?

  • trig - ,

    8/cos40=10.44 inches check that

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