Question

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

Answer 1

64pi * (54-18)
+ 64pi * 18/3
---------------
equals total volume

Answer 2

hope that helped

Answer 3

im still a little confused.. so its 18/3?

Answer 4

I believe so

Answer 5

ok.. thank you :)

Answer 6

no problem :D