Question

You are gonna help me, yep.
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 15 millimeters. The total height of the sand within the top portion of the hourglass is 45 millimeters. The radius of both cylinder and cone is 6 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?

Answer 1

Let me thing for a sec

Answer 2

alrighty

Answer 3

First you have to find the combined volumes of 1 of the cylinders and one of the cones
Because the two are connected right

Answer 4

yep

Answer 5

so do you know how to find the volume of a cylinder

Answer 6

yes, im working on it right now.

Answer 7

cool

Answer 8

What measurement would i use for the height of cylinder in this problem?

Answer 9

they give you the height of the cone and the height of the whole thing

Answer 10

alright, i think i've got it, thanks!

Answer 11

so what is it

Answer 12

what is the volume of the cylinder

Answer 13

1080(pi), and 178.2(pi) for the cone, then the final answer i got was approximately 126.

Answer 14

Lets keep it in terms of pi

Answer 15

Sorry you had it in terms of pi but you got the area of the cone wrong

Answer 16

http://0.tqn.com/d/math/1/0/t/L/conerr.jpg