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.

Hourglass with sand measuring 47 millimeters high
© 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.

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. 
 
Hourglass with sand measuring 47 millimeters high
© 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.

falco276 · Answer

How many seconds will it take until all of the sand has dripped to the bottom of the hourglass?

 6.4

 62.4

 8.5

 56.0

falco276 · Answer

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

falco276 · Answer

@primeralph 
Can you please help me? :)

primeralph · Answer

Can't access the picture. Take a screenshot.

falco276 · Answer

Can't. I'm using Linux, not Windows.
Tell you what. The hourglass is 47cm  at the top.

falco276 · Answer

Sorry Millimeters. :(

primeralph · Answer

@Falco276  The link requires a username and password. Try uploading a picture.

falco276 · Answer

attachment

primeralph · Answer

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