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OpenStudy (anonymous):
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. © 2011 Jupiterimages Corporation Each cone of the hourglass has a height of 12 millimeters. The total height of the sand within the top portion of the hourglass is 47 millimeters. The radius of both the cylinder and cone is 4 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 dripped to the bottom of the hourglass?
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OpenStudy (anonymous):
OpenStudy (anonymous):
plz help
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