Help??

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.
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?

http://learn.flvs.net/webdav/assessme

Question

Help??

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. 
 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?

http://learn.flvs.net/webdav/assessme

anonymous · Answer

http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0806_10/image0014e84886e.jpg

ganeshie8 · Answer

any ideas how to begin solving  ?

anonymous · Answer

Not at all :l

ganeshie8 · Answer

ok... 
question is asking to find out, how much time it takes for sand to fall into bottom

jim_thompson5910 · Answer

Your first step is to find the volume of that composite figure

jim_thompson5910 · Answer

It might help to draw it (expanded/blown up) like this

|dw:1344573898817:dw|