A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

A landscaper dug a hole to plant a tree. The hole is shaped like a cylinder. If the hole is 1 foot 11 inches deep and has a diameter of 2 feet 1 inch, estimate how much dirt was removed.

  • This Question is Closed
  1. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the volume of any cone shaped object is (1/3)(Base area)(height)

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

    idk

  3. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    we have a depth of 23 inches; and a base area of (12.5)^2pi

  4. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (1/3)(156.25pi)(23) = your answer

  5. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    about 1197.9pi inches^3

  6. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ack!!...helps if I read the entire question lol

  7. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cylander..not cone

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

    Volume of a cylinder is Area of the Base * Height. Here, the base is a circle Area of a circle = pi r^2 So Volume = pi * r^2 * h Volume = 3.14 * 23^2 * 25 Volume 41526.5 in^3 This is the exact answer... But I noticed your problem says to estimate. So I would use Volume = 3.14 * 2 * 2 = 12.56 ft^3

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

    i was giving answer choices and neither are the choices

  10. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (156.25pi)(23) = 3593.75 inches^3

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

    a 6.3 ft2 b.7.1 c.7.5 d.8.9

  12. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ah...feet, i converted to inches to make life easier on me :)

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

    lol

  14. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    6.3 should be it

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

    thanks

  16. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i get 6.5..... 6.3 is close if you use a short form of pi

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

    please explain how u got that answer showing work is required (homework assignment)

  18. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i turned the measurements into fractions: 1'11" = 1 11/12 = 23/12 this is your depth/height 2'1" = 2 1/12 = 25/12 this is your diameter, we need half of it. 25/12/2 = 25/24 is your radius base area is pi(r^2): pi (25/24)^2 = pi(625/576) base area times height is area of cylinder pi(625/576)(23/12) = pi(14375/6912) when we plug these into the calulator... we get 2.08pi = 2.08(3.14) = 6.5312 so we go with the closest answer

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

    thank you very much for your help

  20. 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.