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Skittles10412 Group Title

5. Find the volume of the composite space figure to the nearest whole number. (1 point) 416 mm3 705 mm3 1,294 mm3 944 mm3

  • one year ago
  • one year ago

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  1. Skittles10412 Group Title
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    • one year ago
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  2. Skittles10412 Group Title
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    @hairynmad

    • one year ago
  3. hairynmad Group Title
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    Find two separate volumes. You have a rectangular prism and a half cylinder.

    • one year ago
  4. Skittles10412 Group Title
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    formulas lol

    • one year ago
  5. hairynmad Group Title
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    Well, we just did the cylinder. Do the same as before and take half. For the rectangular prism. V=L*W*H or just multiply all sides

    • one year ago
  6. Skittles10412 Group Title
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    so i would do 6*9*11

    • one year ago
  7. Skittles10412 Group Title
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    witch in that case would be 594

    • one year ago
  8. hairynmad Group Title
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    Yes, that's just the volume for the rectangular prism. Now you'll have to find the volume for the half cylinder as well.

    • one year ago
  9. Skittles10412 Group Title
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    okay but no numbers are given for the base or hight of the half cylinder for me to find the volume

    • one year ago
  10. hairynmad Group Title
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    They are given. Just look.

    • one year ago
  11. hairynmad Group Title
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    what's V for cylinder again?

    • one year ago
  12. Skittles10412 Group Title
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    so base is 9 or 6 and height is 11

    • one year ago
  13. Skittles10412 Group Title
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    for a cylinder V= B*h

    • one year ago
  14. hairynmad Group Title
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    height is right, 11 base is wrong

    • one year ago
  15. Skittles10412 Group Title
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    base is not 9 or 6????

    • one year ago
  16. Skittles10412 Group Title
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    for the answer choices there is no pi in any of the answers.

    • one year ago
  17. hairynmad Group Title
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    No, remember B is area so in square units so mm^2, not just mm or one dimensional

    • one year ago
  18. Skittles10412 Group Title
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    but witch one would i use to square in order to get the base?? 9 or 6

    • one year ago
  19. hairynmad Group Title
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    pi is included inside the answer

    • one year ago
  20. hairynmad Group Title
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    neither try to find area of the base NOT a line!!

    • one year ago
  21. Skittles10412 Group Title
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    how would I do that????

    • one year ago
  22. hairynmad Group Title
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    you have half a cylinder so find the V like it's a full cylinder then to find the volume, take half of the full cylinder think of the base as a full circle

    • one year ago
  23. Skittles10412 Group Title
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    so i would times everything by 2 to get the full volume or wht

    • one year ago
  24. hairynmad Group Title
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    No, for cylinder the base is a circle find area of the circle

    • one year ago
  25. hairynmad Group Title
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    A=pi*r^2

    • one year ago
  26. hairynmad Group Title
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    to find area, you need?

    • one year ago
  27. Skittles10412 Group Title
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    okay but whats going to be the Radius in order to do that

    • one year ago
  28. hairynmad Group Title
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    Yes, you need the radius. Look at the picture.

    • one year ago
  29. hairynmad Group Title
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    It shows the diameter.

    • one year ago
  30. Skittles10412 Group Title
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    it would be half of 9 witch is 4.5

    • one year ago
  31. hairynmad Group Title
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    right, now find the area then the volume of the half cylinder then add V of half cylinder to V of rectangular prism and that's the answer

    • one year ago
  32. Skittles10412 Group Title
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    which if its 4.5 and you square that it would be 20.25pi

    • one year ago
  33. Skittles10412 Group Title
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    okay so the V of a rectagular prism is 594 and and the v of the half cylinder is 222.75 and i add that up it = to 816.75 witch is just 817 witch is not one of the choices

    • one year ago
  34. hairynmad Group Title
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    you miscalculated somewhere on the cylinder

    • one year ago
  35. hairynmad Group Title
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    I calculated the right answer. It's one of the choices.

    • one year ago
  36. Skittles10412 Group Title
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    i took 4.5^2 witch is 20.25 and that then becomes 20.25pi then i timed it by 11 and got 222.75

    • one year ago
  37. hairynmad Group Title
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    You did NOT account for half of the cylinder. You calculated it like it was a whole one. Take half of it.

    • one year ago
  38. Skittles10412 Group Title
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    so i have to divide the answer 222.75 by 2

    • one year ago
  39. hairynmad Group Title
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    Of course, it's not showing a full cylinder.

    • one year ago
  40. hairynmad Group Title
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    Vcyl=B*h B=pi*r^2=pi*4.5^2 h=11 Vrect=LWH=11*9*6 Total Volume=Vrect + 0.5*Vcyl

    • one year ago
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