Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

123F

What is the volume of this composite solid? A)588in3 B)784in3 C)915in3 D)980in3

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    • 2 years ago
    1 Attachment
  2. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    looks like this is made up of 3 objects: 2 cubes and a triangular prism

    • 2 years ago
  3. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • 2 years ago
  4. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    you have all the dimensions, so you just need to find the volume of each object and sum them

    • 2 years ago
  5. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • 2 years ago
  6. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    but how?

    • 2 years ago
  7. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    volume is \[length * width * height\]

    • 2 years ago
  8. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    for instance, with the first rectangular prism on the left, 8in by 7in by 7in

    • 2 years ago
  9. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    cool

    • 2 years ago
  10. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    triangular prism?

    • 2 years ago
  11. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    volume is the product of those 3 values, and the same for the other rectangular prism, now with the triangular prism just remember that \[A=\frac{1}{2}*base*height\]

    • 2 years ago
  12. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    so you then multiply A by the 3rd dimension

    • 2 years ago
  13. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    so, length∗width∗height A=1\2∗base∗height

    • 2 years ago
  14. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    and because you are multiplying values with "inches" as the units, the volume is in inches cubed, \[in^3\]

    • 2 years ago
  15. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you

    • 2 years ago
  16. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    no problem, if you need to check your answer I'm around

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

    hey moderator my computer say its forbidden to get on here why is that

    • 2 years ago
  18. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    what do i use for the triangular prism?

    • 2 years ago
  19. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    dpfan

    • 2 years ago
  20. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    yes?

    • 2 years ago
  21. dpflan
    Best Response
    You've already chosen the best response.
    Medals 2

    looking at the picture, it looks as though the length of the left side the triangle is equal to 8 and the length of the other side is equal to 7....

    • 2 years ago
  22. 123F
    Best Response
    You've already chosen the best response.
    Medals 0

    7*7*8 = 392 7*7*8 = 392 8*7/2=28 so 392+392+28=812in3

    • 2 years ago
    • Attachments:

See more questions >>>

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.