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anonymous

  • 5 years ago

find the height of a prism of a base if the volume is 9 and the area of the base is 18

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  1. anonymous
    • 5 years ago
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    volume of a prism = area of base x height so plug in your 2 values and solve the equation

  2. anonymous
    • 5 years ago
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    i assume that the prism is standing on its end!

  3. anonymous
    • 5 years ago
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    if the base of a right prism is a rhombus with diagonals 10 in and 12 in and the volume of the prism is 60 cu in find the height of the prism please help!

  4. anonymous
    • 5 years ago
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    i really dont understand geometry at alll!

  5. anonymous
    • 5 years ago
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    well we usually talk about the length and cross sectional area of a prism. I prism is a 3 dimensional object with a uniform cross section - a bit like a toblerone bar of chocolate

  6. anonymous
    • 5 years ago
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    ok . could you please explain to me how to solve the problem

  7. anonymous
    • 5 years ago
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    well assume the prism is resting on its base which is a rhombus then its volume = area of the rhombus x the height so 60 = area of rhombus x h so we need to calculate the area of the rhombus

  8. anonymous
    • 5 years ago
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    hold on a bit - to be honest i'm stuck with that bit

  9. anonymous
    • 5 years ago
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    ok so its going to be d1d2 divided by 2 to solve for area

  10. anonymous
    • 5 years ago
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    heck! is that the area of a rhombus - you've got that from a maths book or by other means??

  11. anonymous
    • 5 years ago
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    other means but when i calulate it it comes out to 60 = 60

  12. anonymous
    • 5 years ago
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    i dont remember to be honest

  13. anonymous
    • 5 years ago
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    well d1d2 /2 = 30/2 = 15 so qwe have 60 = 15 x h h = 4 height is 4

  14. anonymous
    • 5 years ago
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    where did u get 15 from?

  15. anonymous
    • 5 years ago
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    where did you get 30 from im lost

  16. anonymous
    • 5 years ago
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    sorry - i must be tired its 12 x 10 divided by 2 giving 60 - either the d1d2 formula is wrong or volume = 60 is wrong. hold on and i'll check my maths stuff

  17. anonymous
    • 5 years ago
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    ok - the volume d1d2/2 is correct so the answer must be h = 1 60 = 60 x h h=1

  18. anonymous
    • 5 years ago
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    is that possible?

  19. anonymous
    • 5 years ago
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    lol - thats wrong because the diagonals are in inches and the volume is in cubic feet right 60 cu feet = 60 x 12^3 cu ins = 103680 cu ins so 103680 = 60 x h h = 12^3 = 1728 ins or 144 ft

  20. anonymous
    • 5 years ago
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    phew - i think thats enough for today my brain is tired

  21. anonymous
    • 5 years ago
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    how did you get to that?

  22. anonymous
    • 5 years ago
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    well the volume is 60 cu ft isn't it

  23. anonymous
    • 5 years ago
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    yes

  24. anonymous
    • 5 years ago
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    i 'm going crazy - i've just checked your earlier post - its 60 cu ins there

  25. anonymous
    • 5 years ago
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    in which case h = 1 inch as i said earlier

  26. anonymous
    • 5 years ago
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    that is possible brit

  27. anonymous
    • 5 years ago
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    lol okay thank you but im not done working your brain 2 more questions if you dont mind

  28. anonymous
    • 5 years ago
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    give me a medal first! lol

  29. anonymous
    • 5 years ago
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    ok so the diagonal of a cube is 7\[\sqrt{3}\] find the voulme of the cube

  30. anonymous
    • 5 years ago
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    i assume you mean the diagonal of one side of the cube. by pythagoras (7sqrt3)^2 = 2x^2 (where x = one side of cube) 147 = 2x^2 x = sqrt(147/2) = 8.5732 vlume of cube = (8.5732)^3 = 630.13 correct to 2 dec places

  31. anonymous
    • 5 years ago
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    are u still there

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