A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

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

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    68.3 38.4 268.8 230.4

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I think its 268.8

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Marcorie @misssunshinexxoxo @jdoe0001 @dan815

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    is their a pic?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @mathmate can you please help him

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry im not really sure try asking someone else i tried it and got the wrong answer

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thats okay :)

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Anon.

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @slade

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i agree with u @CaptainLlama49

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Cool I just might have it right

  15. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    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?

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

  17. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yeah, so you should be able to figure out the rest

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I got 268.8

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Is that correct

  20. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Well lets find the volume of the cone and cylinder first, what did you get?

  21. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    268.8

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Astrophysics

  23. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Well I don't really feel like doing the whole problem, I gave you the process you can plug in the numbers and check.

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    100% YES!

  25. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Haha, so it was right? :)

  26. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yep

  27. Astrophysics
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Nice work

  28. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you :)

  29. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.