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anonymous

  • one year ago

PLEASE HELP! I ALWAYS MEDAL :) An hourglass consists of two sets of congruent composite figures on either end. Each composite figure is made up of a cone and a cylinder, as shown below: Hourglass with sand measuring 54 millimeters high Each cone of the hourglass has a height of 18 millimeters. The total height of the sand within the top portion of the hourglass is 54 millimeters. The radius of both cylinder and cone is 8 millimeters. Sand drips from the top of the hourglass to the bottom at a rate of 10π cubic millimeters per second. How many seconds will it take until all of the sand has

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  1. anonymous
    • one year ago
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  2. arivillafana
    • one year ago
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    64pi * (54-18) + 64pi * 18/3 --------------- equals total volume

  3. arivillafana
    • one year ago
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    hope that helped

  4. anonymous
    • one year ago
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    im still a little confused.. so its 18/3?

  5. arivillafana
    • one year ago
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    I believe so

  6. anonymous
    • one year ago
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    ok.. thank you :)

  7. arivillafana
    • one year ago
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    no problem :D

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