anonymous
  • anonymous
An hour glass consists of two sets of congruent composite figures on either end. Each composite figure is made of a cone and cylinder. Each cone of the hour glass has a height of 15mm. The total height of the sand within the top of the portion of the hour glass is 45mm. The radius of the cone and cylinder is 6mm. Sand drops from the top of the hour glass to the bottom at a rate of PI10 (no symbol on my keyboard). How many seconds will it take until all of the sand has dripped to the bottom of the hourglass?
Mathematics
chestercat
  • chestercat
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
the answer choices are 126, 108, 18, and 29. help would be appreciated asap please (:
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