anonymous
  • anonymous
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: 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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
68.3 38.4 268.8 230.4
anonymous
  • anonymous
I think its 268.8
anonymous
  • anonymous
@Marcorie @misssunshinexxoxo @jdoe0001 @dan815

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More answers

anonymous
  • anonymous
is their a pic?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
@mathmate can you please help him
anonymous
  • anonymous
lol
anonymous
  • anonymous
sorry im not really sure try asking someone else i tried it and got the wrong answer
anonymous
  • anonymous
Thats okay :)
anonymous
  • anonymous
@Anon.
anonymous
  • anonymous
@slade
anonymous
  • anonymous
i agree with u @CaptainLlama49
anonymous
  • anonymous
Cool I just might have it right
Astrophysics
  • Astrophysics
Well you have the volume of the cylinder which is \[V = \pi r^2 h\] and cone is \[V_c = 1/3 \pi r^2h\] we are given that the height of the hourglass is 18 mm, and the total height within the top portion of the hour glass is 54 mm. It also tells us the radius of the cylinder and the cone is 8mm. So we just need to find the total volume, using the formulas above and once we have that we can just divide by \[10 \pi~ mm^3\] to figure out the time it will take the sand to be at the bottom I assume?
anonymous
  • anonymous
yes
Astrophysics
  • Astrophysics
Yeah, so you should be able to figure out the rest
anonymous
  • anonymous
I got 268.8
anonymous
  • anonymous
Is that correct
Astrophysics
  • Astrophysics
Well lets find the volume of the cone and cylinder first, what did you get?
anonymous
  • anonymous
268.8
anonymous
  • anonymous
@Astrophysics
Astrophysics
  • Astrophysics
Well I don't really feel like doing the whole problem, I gave you the process you can plug in the numbers and check.
anonymous
  • anonymous
100% YES!
Astrophysics
  • Astrophysics
Haha, so it was right? :)
anonymous
  • anonymous
Yep
Astrophysics
  • Astrophysics
Nice work
anonymous
  • anonymous
Thank you :)

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