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.

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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 dripped to the bottom of the hourglass?

Question

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 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 dripped to the bottom of the hourglass?

anonymous · Answer

http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0806_10/image0034e84886e.jpg

anonymous · Answer

68.3

 38.4

 268.8

 230.4

anonymous · Answer

Can someone please help me understand it? I worked it out, but my answer is not presented as one of the options. Someone please help?

anonymous · Answer

Anyone?

amistre64 · Answer

what did you get for the volume up top?

amistre64 · Answer

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